SUSE-SU-2023:0735-1: important: Security update for go1.20
sle-security-updates at lists.suse.com
sle-security-updates at lists.suse.com
Tue Mar 14 20:30:10 UTC 2023
# Security update for go1.20
Announcement ID: SUSE-SU-2023:0735-1
Rating: important
References:
* #1206346
* #1208269
* #1208270
* #1208271
* #1208272
* #1209030
Cross-References:
* CVE-2022-41722
* CVE-2022-41723
* CVE-2022-41724
* CVE-2022-41725
* CVE-2023-24532
CVSS scores:
* CVE-2022-41722 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2022-41723 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2022-41723 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2022-41724 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2022-41724 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2022-41725 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2022-41725 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2023-24532 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:
* Development Tools Module 15-SP4
* openSUSE Leap 15.4
* SUSE Linux Enterprise Desktop 15 SP4
* SUSE Linux Enterprise High Performance Computing 15 SP4
* SUSE Linux Enterprise Real Time 15 SP4
* SUSE Linux Enterprise Server 15 SP4
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
* SUSE Manager Proxy 4.3
* SUSE Manager Retail Branch Server 4.3
* SUSE Manager Server 4.3
An update that solves five vulnerabilities, contains one feature and has one fix
can now be installed.
## Description:
This update for go1.20 fixes the following issues:
* Improvements to go1.x packaging spec:
* On Tumbleweed bootstrap with current default gcc13 and gccgo118
* On SLE-12 aarch64 ppc64le ppc64 remove overrides to bootstrap using go1.x
package (%bcond_without gccgo). This is no longer needed on current
SLE-12:Update and removing will consolidate the build configurations used.
* Change source URLs to go.dev as per Go upstream
* On x86_64 export GOAMD64=v1 as per the current baseline. At this time forgo
GOAMD64=v3 option for x86_64_v3 support.
* On x86_64 %define go_amd64=v1 as current instruction baseline
* In %check on x86_64 use value %go_amd64=v1 as GOAMD64=v1 to grep correct
TSAN version is checked out from LLVM with new spelling for
internal/amd64v1/race_linux.syso
go1.20.2 (released 2023-03-07) includes a security fix to the crypto/elliptic
package, as well as bug fixes to the compiler, the covdata command, the linker,
the runtime, and the crypto/ecdh, crypto/rsa, crypto/x509, os, and syscall
packages. (boo#1206346)
* CVE-2023-24532: crypto/elliptic: Fixed that specific unreduced P-256 scalars
produce incorrect results (boo#1209030)
* cmd/covdata: short read on string table when merging coverage counters
* runtime: some linkname signatures do not match
* cmd/compile: inline static init cause compile time error
* cmd/compile: internal compiler error:
'(*Tree[go.shape.int]).RemoveParent.func1': value .dict (nil) incorrectly
live at entry
* crypto/ecdh: ECDH method doesn't check curve
* cmd/link: relocation truncated to fit: R_ARM_CALL against `runtime.duffcopy'
* crypto/internal/bigmod: flag amd64 assembly as noescape
* runtime: endless traceback when panic in generics funtion
* runtime: long latency of sweep assists
* syscall.Faccessat and os.LookPath regression in Go 1.20
* os: cmd/go gets error "copy_file_range: function not implemented"
* net: TestTCPSelfConnect failures due to unexpected connections
* syscall: Environ uses an invalid unsafe.Pointer conversion on Windows
* cmd/compile: ICE on method value involving imported anonymous interface
* crypto/x509: Incorrect documentation for ParsePKCS8PrivateKey
* crypto/x509: TestSystemVerify consistently failing
go1.20.1 (released 2023-02-14) includes security fixes to the crypto/tls,
mime/multipart, net/http, and path/filepath packages, as well as bug fixes to
the compiler, the go command, the linker, the runtime, and the time package.
(bsc#1206346)
* CVE-2022-41722 CVE-2022-41723 CVE-2022-41724 CVE-2022-41725
* bsc#1208269 security: fix CVE-2022-41722 path/filepath: path traversal in
filepath.Clean on Windows
* bsc#1208270 security: fix CVE-2022-41723 net/http: avoid quadratic
complexity in HPACK decoding
* bsc#1208271 security: fix CVE-2022-41724 crypto/tls: large handshake records
may cause panics
* bsc#1208272 security: fix CVE-2022-41725 net/http, mime/multipart: denial of
service from excessive resource consumption
* time: update zoneinfo_abbrs on Windows
* cmd/link: .go.buildinfo is gc'ed by --gc-sections
* cmd/compile/internal/pgo: Detect sample value position instead of hard-
coding
* cmd/compile: constant overflows when assigned to package level var (Go 1.20
regression)
* cmd/compile: internal compiler error: panic: interface conversion: ir.Node
is _ir.CompLitExpr, not_ ir.Name
* cmd/compile: internal compiler error: Type.Elem UNION
* runtime: GOOS=ios fails Apple's app validation due to use of private API
* cmd/go/internal/test: stale flagdefs.go not detected by tests
* all: test failures with ETXTBSY
* cmd/go/internal/modfetch:
TestCodeRepo/gopkg.in_natefinch_lumberjack.v2/latest failing
* go1.20 (released 2023-02-01) is a major release of Go. go1.20.x minor
releases will be provided through February 2024.
https://github.com/golang/go/wiki/Go-Release-Cycle go1.20 arrives six months
after go1.19. Most of its changes are in the implementation of the
toolchain, runtime, and libraries. As always, the release maintains the Go 1
promise of compatibility. We expect almost all Go programs to continue to
compile and run as before. ( bsc#1206346 jsc#PED-1962 )
* Go 1.20 includes four changes to the language
* Language change: Go 1.17 added conversions from slice to an array pointer.
Go 1.20 extends this to allow conversions from a slice to an array
* Language change: The unsafe package defines three new functions SliceData,
String, and StringData. Along with Go 1.17's Slice, these functions now
provide the complete ability to construct and deconstruct slice and string
values, without depending on their exact representation.
* Language change: The specification now defines that struct values are
compared one field at a time, considering fields in the order they appear in
the struct type definition, and stopping at the first mismatch. The
specification could previously have been read as if all fields needed to be
compared beyond the first mismatch. Similarly, the specification now defines
that array values are compared one element at a time, in increasing index
order. In both cases, the difference affects whether certain comparisons
must panic. Existing programs are unchanged: the new spec wording describes
what the implementations have always done.
* Language change: Comparable types (such as ordinary interfaces) may now
satisfy comparable constraints, even if the type arguments are not strictly
comparable (comparison may panic at runtime). This makes it possible to
instantiate a type parameter constrained by comparable (e.g., a type
parameter for a user-defined generic map key) with a non-strictly comparable
type argument such as an interface type, or a composite type containing an
interface type.
* go command: The directory $GOROOT/pkg no longer stores pre-compiled package
archives for the standard library: go install no longer writes them, the go
build no longer checks for them, and the Go distribution no longer ships
them. Instead, packages in the standard library are built as needed and
cached in the build cache, just like packages outside GOROOT. This change
reduces the size of the Go distribution and also avoids C toolchain skew for
packages that use cgo. Refs jsc#PED-1962
* go command: The implementation of go test -json has been improved to make it
more robust. Programs that run go test -json do not need any updates.
Programs that invoke go tool test2json directly should now run the test
binary with -v=test2json (for example, go test -v=test2json or ./pkg.test
-test.v=test2json) instead of plain -v.
* go command: A related change to go test -json is the addition of an event
with Action set to start at the beginning of each test program's execution.
When running multiple tests using the go command, these start events are
guaranteed to be emitted in the same order as the packages named on the
command line.
* go command: The go command now defines architecture feature build tags, such
as amd64.v2, to allow selecting a package implementation file based on the
presence or absence of a particular architecture feature. See go help
buildconstraint for details.
* go command: The go subcommands now accept -C <dir> to change directory to
<dir> before performing the command, which may be useful for scripts that
need to execute commands in multiple different modules.
* go command: The go build and go test commands no longer accept the -i flag,
which has been deprecated since Go 1.16.
* go command: The go generate command now accepts -skip <pattern> to skip
//go:generate directives matching <pattern>.
* go command: The go test command now accepts -skip <pattern> to skip tests,
subtests, or examples matching <pattern>.
* go command: When the main module is located within GOPATH/src, go install no
longer installs libraries for non-main packages to GOPATH/pkg, and go list
no longer reports a Target field for such packages. (In module mode,
compiled packages are stored in the build cache only, but a bug had caused
the GOPATH install targets to unexpectedly remain in effect.)
* go command: The go build, go install, and other build-related commands now
support a -pgo flag that enables profile-guided optimization, which is
described in more detail in the Compiler section below. The -pgo flag
specifies the file path of the profile. Specifying -pgo=auto causes the go
command to search for a file named default.pgo in the main package's
directory and use it if present. This mode currently requires a single main
package to be specified on the command line, but we plan to lift this
restriction in a future release. Specifying -pgo=off turns off profile-
guided optimization.
* go command: The go build, go install, and other build-related commands now
support a -cover flag that builds the specified target with code coverage
instrumentation. This is described in more detail in the Cover section
below.
* go version: The go version -m command now supports reading more types of Go
binaries, most notably, Windows DLLs built with go build -buildmode=c-shared
and Linux binaries without execute permission.
* Cgo: The go command now disables cgo by default on systems without a C
toolchain. More specifically, when the CGO_ENABLED environment variable is
unset, the CC environment variable is unset, and the default C compiler
(typically clang or gcc) is not found in the path, CGO_ENABLED defaults to
0. As always, you can override the default by setting CGO_ENABLED
explicitly. The most important effect of the default change is that when Go
is installed on a system without a C compiler, it will now use pure Go
builds for packages in the standard library that use cgo, instead of using
pre-distributed package archives (which have been removed, as noted above)
or attempting to use cgo and failing. This makes Go work better in some
minimal container environments as well as on macOS, where pre-distributed
package archives have not been used for cgo-based packages since Go 1.16.
The packages in the standard library that use cgo are net, os/user, and
plugin. On macOS, the net and os/user packages have been rewritten not to
use cgo: the same code is now used for cgo and non-cgo builds as well as
cross-compiled builds. On Windows, the net and os/user packages have never
used cgo. On other systems, builds with cgo disabled will use a pure Go
version of these packages. On macOS, the race detector has been rewritten
not to use cgo: race-detector-enabled programs can be built and run without
Xcode. On Linux and other Unix systems, and on Windows, a host C toolchain
is required to use the race detector.
* go cover: Go 1.20 supports collecting code coverage profiles for programs
(applications and integration tests), as opposed to just unit tests. To
collect coverage data for a program, build it with go build's -cover flag,
then run the resulting binary with the environment variable GOCOVERDIR set
to an output directory for coverage profiles. See the 'coverage for
integration tests' landing page for more on how to get started. For details
on the design and implementation, see the proposal.
* go vet: Improved detection of loop variable capture by nested functions. The
vet tool now reports references to loop variables following a call to
T.Parallel() within subtest function bodies. Such references may observe the
value of the variable from a different iteration (typically causing test
cases to be skipped) or an invalid state due to unsynchronized concurrent
access.
* go vet: The tool also detects reference mistakes in more places. Previously
it would only consider the last statement of the loop body, but now it
recursively inspects the last statements within if, switch, and select
statements.
* go vet: New diagnostic for incorrect time formats. The vet tool now reports
use of the time format 2006-02-01 (yyyy-dd-mm) with Time.Format and
time.Parse. This format does not appear in common date standards, but is
frequently used by mistake when attempting to use the ISO 8601 date format
(yyyy-mm-dd).
* Runtime: Some of the garbage collector's internal data structures were
reorganized to be both more space and CPU efficient. This change reduces
memory overheads and improves overall CPU performance by up to 2%.
* Runtime: The garbage collector behaves less erratically with respect to
goroutine assists in some circumstances.
* Runtime: Go 1.20 adds a new runtime/coverage package containing APIs for
writing coverage profile data at runtime from long-running and/or server
programs that do not terminate via os.Exit().
* Compiler: Go 1.20 adds preview support for profile-guided optimization
(PGO). PGO enables the toolchain to perform application- and workload-
specific optimizations based on run-time profile information. Currently, the
compiler supports pprof CPU profiles, which can be collected through usual
means, such as the runtime/pprof or net/http/pprof packages. To enable PGO,
pass the path of a pprof profile file via the -pgo flag to go build, as
mentioned above. Go 1.20 uses PGO to more aggressively inline functions at
hot call sites. Benchmarks for a representative set of Go programs show
enabling profile-guided inlining optimization improves performance about
3–4%. See the PGO user guide for detailed documentation. We plan to add more
profile-guided optimizations in future releases. Note that profile-guided
optimization is a preview, so please use it with appropriate caution.
* Compiler: The Go 1.20 compiler upgraded its front-end to use a new way of
handling the compiler's internal data, which fixes several generic-types
issues and enables type declarations within generic functions and methods.
* Compiler: The compiler now rejects anonymous interface cycles with a
compiler error by default. These arise from tricky uses of embedded
interfaces and have always had subtle correctness issues, yet we have no
evidence that they're actually used in practice. Assuming no reports from
users adversely affected by this change, we plan to update the language
specification for Go 1.22 to formally disallow them so tools authors can
stop supporting them too.
* Compiler: Go 1.18 and 1.19 saw regressions in build speed, largely due to
the addition of support for generics and follow-on work. Go 1.20 improves
build speeds by up to 10%, bringing it back in line with Go 1.17. Relative
to Go 1.19, generated code performance is also generally slightly improved.
* Linker: On Linux, the linker now selects the dynamic interpreter for glibc
or musl at link time.
* Linker: On Windows, the Go linker now supports modern LLVM-based C
toolchains.
* Linker: Go 1.20 uses go: and type: prefixes for compiler-generated symbols
rather than go. and type.. This avoids confusion for user packages whose
name starts with go.. The debug/gosym package understands this new naming
convention for binaries built with Go 1.20 and newer.
* Bootstrap: When building a Go release from source and GOROOT_BOOTSTRAP is
not set, previous versions of Go looked for a Go 1.4 or later bootstrap
toolchain in the directory $HOME/go1.4 (%HOMEDRIVE%%HOMEPATH%\go1.4 on
Windows). Go 1.18 and Go 1.19 looked first for $HOME/go1.17 or
$HOME/sdk/go1.17 before falling back to $HOME/go1.4, in anticipation of
requiring Go 1.17 for use when bootstrapping Go 1.20. Go 1.20 does require a
Go 1.17 release for bootstrapping, but we realized that we should adopt the
latest point release of the bootstrap toolchain, so it requires Go 1.17.13.
Go 1.20 looks for $HOME/go1.17.13 or $HOME/sdk/go1.17.13 before falling back
to $HOME/go1.4 (to support systems that hard-coded the path $HOME/go1.4 but
have installed a newer Go toolchain there). In the future, we plan to move
the bootstrap toolchain forward approximately once a year, and in particular
we expect that Go 1.22 will require the final point release of Go 1.20 for
bootstrap.
* Library: Go 1.20 adds a new crypto/ecdh package to provide explicit support
for Elliptic Curve Diffie-Hellman key exchanges over NIST curves and
Curve25519. Programs should use crypto/ecdh instead of the lower-level
functionality in crypto/elliptic for ECDH, and third-party modules for more
advanced use cases.
* Error handling: Go 1.20 expands support for error wrapping to permit an
error to wrap multiple other errors.
* Error handling: An error e can wrap more than one error by providing an
Unwrap method that returns a []error.
* Error handling: The errors.Is and errors.As functions have been updated to
inspect multiply wrapped errors.
* Error handling: The fmt.Errorf function now supports multiple occurrences of
the %w format verb, which will cause it to return an error that wraps all of
those error operands.
* Error handling: The new function errors.Join returns an error wrapping a
list of errors.
* HTTP ResponseController: The new "net/http".ResponseController type provides
access to extended per-request functionality not handled by the
"net/http".ResponseWriter interface. The ResponseController type provides a
clearer, more discoverable way to add per-handler controls. Two such
controls also added in Go 1.20 are SetReadDeadline and SetWriteDeadline,
which allow setting per-request read and write deadlines.
* New ReverseProxy Rewrite hook: The httputil.ReverseProxy forwarding proxy
includes a new Rewrite hook function, superseding the previous Director
hook.
* archive/tar: When the GODEBUG=tarinsecurepath=0 environment variable is set,
Reader.Next method will now return the error ErrInsecurePath for an entry
with a file name that is an absolute path, refers to a location outside the
current directory, contains invalid characters, or (on Windows) is a
reserved name such as NUL. A future version of Go may disable insecure paths
by default.
* archive/zip: When the GODEBUG=zipinsecurepath=0 environment variable is set,
NewReader will now return the error ErrInsecurePath when opening an archive
which contains any file name that is an absolute path, refers to a location
outside the current directory, contains invalid characters, or (on Windows)
is a reserved names such as NUL. A future version of Go may disable insecure
paths by default.
* archive/zip: Reading from a directory file that contains file data will now
return an error. The zip specification does not permit directory files to
contain file data, so this change only affects reading from invalid
archives.
* bytes: The new CutPrefix and CutSuffix functions are like TrimPrefix and
TrimSuffix but also report whether the string was trimmed.
* bytes: The new Clone function allocates a copy of a byte slice.
* context: The new WithCancelCause function provides a way to cancel a context
with a given error. That error can be retrieved by calling the new Cause
function.
* crypto/ecdsa: When using supported curves, all operations are now
implemented in constant time. This led to an increase in CPU time between 5%
and 30%, mostly affecting P-384 and P-521.
* crypto/ecdsa: The new PrivateKey.ECDH method converts an ecdsa.PrivateKey to
an ecdh.PrivateKey.
* crypto/ed25519: The PrivateKey.Sign method and the VerifyWithOptions
function now support signing pre-hashed messages with Ed25519ph, indicated
by an Options.HashFunc that returns crypto.SHA512. They also now support
Ed25519ctx and Ed25519ph with context, indicated by setting the new
Options.Context field.
* crypto/rsa: The new field OAEPOptions.MGFHash allows configuring the MGF1
hash separately for OAEP decryption.
* crypto/rsa: crypto/rsa now uses a new, safer, constant-time backend. This
causes a CPU runtime increase for decryption operations between
approximately 15% (RSA-2048 on amd64) and 45% (RSA-4096 on arm64), and more
on 32-bit architectures. Encryption operations are approximately 20x slower
than before (but still 5-10x faster than decryption). Performance is
expected to improve in future releases. Programs must not modify or manually
generate the fields of PrecomputedValues.
* crypto/subtle: The new function XORBytes XORs two byte slices together.
* crypto/tls: Parsed certificates are now shared across all clients actively
using that certificate. The memory savings can be significant in programs
that make many concurrent connections to a server or collection of servers
sharing any part of their certificate chains.
* crypto/tls: For a handshake failure due to a certificate verification
failure, the TLS client and server now return an error of the new type
CertificateVerificationError, which includes the presented certificates.
* crypto/x509: ParsePKCS8PrivateKey and MarshalPKCS8PrivateKey now support
keys of type _crypto/ecdh.PrivateKey. ParsePKIXPublicKey and
MarshalPKIXPublicKey now support keys of type_ crypto/ecdh.PublicKey.
Parsing NIST curve keys still returns values of type _ecdsa.PublicKey and_
ecdsa.PrivateKey. Use their new ECDH methods to convert to the crypto/ecdh
types.
* crypto/x509: The new SetFallbackRoots function allows a program to define a
set of fallback root certificates in case an operating system verifier or
standard platform root bundle is unavailable at runtime. It will most
commonly be used with a new package, golang.org/x/crypto/x509roots/fallback,
which will provide an up to date root bundle.
* debug/elf: Attempts to read from a SHT_NOBITS section using Section.Data or
the reader returned by Section.Open now return an error.
* debug/elf: Additional R_LARCH_* constants are defined for use with LoongArch
systems.
* debug/elf: Additional R_PPC64_* constants are defined for use with PPC64
ELFv2 relocations.
* debug/elf: The constant value for R_PPC64_SECTOFF_LO_DS is corrected, from
61 to 62.
* debug/gosym: Due to a change of Go's symbol naming conventions, tools that
process Go binaries should use Go 1.20's debug/gosym package to
transparently handle both old and new binaries.
* debug/pe: Additional IMAGE_FILE_MACHINE_RISCV* constants are defined for use
with RISC-V systems.
* encoding/binary: The ReadVarint and ReadUvarint functions will now return
io.ErrUnexpectedEOF after reading a partial value, rather than io.EOF.
* encoding/xml: The new Encoder.Close method can be used to check for unclosed
elements when finished encoding.
* encoding/xml: The decoder now rejects element and attribute names with more
than one colon, such as <a:b:c>, as well as namespaces that resolve to an
empty string, such as xmlns:a="".
* encoding/xml: The decoder now rejects elements that use different namespace
prefixes in the opening and closing tag, even if those prefixes both denote
the same namespace.
* errors: The new Join function returns an error wrapping a list of errors.
* fmt: The Errorf function supports multiple occurrences of the %w format
verb, returning an error that unwraps to the list of all arguments to %w.
* fmt: The new FormatString function recovers the formatting directive
corresponding to a State, which can be useful in Formatter. implementations.
* go/ast: The new RangeStmt.Range field records the position of the range
keyword in a range statement.
* go/ast: The new File.FileStart and File.FileEnd fields record the position
of the start and end of the entire source file.
* go/token: The new FileSet.RemoveFile method removes a file from a FileSet.
Long-running programs can use this to release memory associated with files
they no longer need.
* go/types: The new Satisfies function reports whether a type satisfies a
constraint. This change aligns with the new language semantics that
distinguish satisfying a constraint from implementing an interface.
* io: The new OffsetWriter wraps an underlying WriterAt and provides Seek,
Write, and WriteAt methods that adjust their effective file offset position
by a fixed amount.
* io/fs: The new error SkipAll terminates a WalkDir immediately but
successfully.
* math/big: The math/big package's wide scope and input-dependent timing make
it ill-suited for implementing cryptography. The cryptography packages in
the standard library no longer call non-trivial Int methods on attacker-
controlled inputs. In the future, the determination of whether a bug in
math/big is considered a security vulnerability will depend on its wider
impact on the standard library.
* math/rand: The math/rand package now automatically seeds the global random
number generator (used by top-level functions like Float64 and Int) with a
random value, and the top-level Seed function has been deprecated. Programs
that need a reproducible sequence of random numbers should prefer to
allocate their own random source, using rand.New(rand.NewSource(seed)).
* math/rand: Programs that need the earlier consistent global seeding behavior
can set GODEBUG=randautoseed=0 in their environment.
* math/rand: The top-level Read function has been deprecated. In almost all
cases, crypto/rand.Read is more appropriate.
* mime: The ParseMediaType function now allows duplicate parameter names, so
long as the values of the names are the same.
* mime/multipart: Methods of the Reader type now wrap errors returned by the
underlying io.Reader.
* net: The LookupCNAME function now consistently returns the contents of a
CNAME record when one exists. Previously on Unix systems and when using the
pure Go resolver, LookupCNAME would return an error if a CNAME record
referred to a name that with no A, AAAA, or CNAME record. This change
modifies LookupCNAME to match the previous behavior on Windows, allowing
LookupCNAME to succeed whenever a CNAME exists.
* net: Interface.Flags now includes the new flag FlagRunning, indicating an
operationally active interface. An interface which is administratively
configured but not active (for example, because the network cable is not
connected) will have FlagUp set but not FlagRunning.
* net: The new Dialer.ControlContext field contains a callback function
similar to the existing Dialer.Control hook, that additionally accepts the
dial context as a parameter. Control is ignored when ControlContext is not
nil.
* net: The Go DNS resolver recognizes the trust-ad resolver option. When
options trust-ad is set in resolv.conf, the Go resolver will set the AD bit
in DNS queries. The resolver does not make use of the AD bit in responses.
* net: DNS resolution will detect changes to /etc/nsswitch.conf and reload the
file when it changes. Checks are made at most once every five seconds,
matching the previous handling of /etc/hosts and /etc/resolv.conf.
* net/http: The ResponseWriter.WriteHeader function now supports sending 1xx
status codes.
* net/http: The new Server.DisableGeneralOptionsHandler configuration setting
allows disabling the default OPTIONS * handler.
* net/http: The new Transport.OnProxyConnectResponse hook is called when a
Transport receives an HTTP response from a proxy for a CONNECT request.
* net/http: The HTTP server now accepts HEAD requests containing a body,
rather than rejecting them as invalid.
* net/http: HTTP/2 stream errors returned by net/http functions may be
converted to a golang.org/x/net/http2.StreamError using errors.As.
* net/http: Leading and trailing spaces are trimmed from cookie names, rather
than being rejected as invalid. For example, a cookie setting of "name
=value" is now accepted as setting the cookie "name".
* net/netip: The new IPv6LinkLocalAllRouters and IPv6Loopback functions are
the net/netip equivalents of net.IPv6loopback and
net.IPv6linklocalallrouters.
* os: On Windows, the name NUL is no longer treated as a special case in Mkdir
and Stat.
* os: On Windows, File.Stat now uses the file handle to retrieve attributes
when the file is a directory. Previously it would use the path passed to
Open, which may no longer be the file represented by the file handle if the
file has been moved or replaced. This change modifies Open to open
directories without the FILE_SHARE_DELETE access, which match the behavior
of regular files.
* os: On Windows, File.Seek now supports seeking to the beginning of a
directory.
* os/exec: The new Cmd fields Cancel and WaitDelay specify the behavior of the
Cmd when its associated Context is canceled or its process exits with I/O
pipes still held open by a child process.
* path/filepath: The new error SkipAll terminates a Walk immediately but
successfully.
* path/filepath: The new IsLocal function reports whether a path is lexically
local to a directory. For example, if IsLocal(p) is true, then Open(p) will
refer to a file that is lexically within the subtree rooted at the current
directory.
* reflect: The new Value.Comparable and Value.Equal methods can be used to
compare two Values for equality. Comparable reports whether Equal is a valid
operation for a given Value receiver.
* reflect: The new Value.Grow method extends a slice to guarantee space for
another n elements.
* reflect: The new Value.SetZero method sets a value to be the zero value for
its type.
* reflect: Go 1.18 introduced Value.SetIterKey and Value.SetIterValue methods.
These are optimizations: v.SetIterKey(it) is meant to be equivalent to
v.Set(it.Key()). The implementations incorrectly omitted a check for use of
unexported fields that was present in the unoptimized forms. Go 1.20
corrects these methods to include the unexported field check.
* regexp: Go 1.19.2 and Go 1.18.7 included a security fix to the regular
expression parser, making it reject very large expressions that would
consume too much memory. Because Go patch releases do not introduce new API,
the parser returned syntax.ErrInternalError in this case. Go 1.20 adds a
more specific error, syntax.ErrLarge, which the parser now returns instead.
* runtime/cgo: Go 1.20 adds new Incomplete marker type. Code generated by cgo
will use cgo.Incomplete to mark an incomplete C type.
* runtime/metrics: Go 1.20 adds new supported metrics, including the current
GOMAXPROCS setting (/sched/gomaxprocs:threads), the number of cgo calls
executed (/cgo/go-to-c-calls:calls), total mutex block time
(/sync/mutex/wait/total:seconds), and various measures of time spent in
garbage collection.
* runtime/metrics: Time-based histogram metrics are now less precise, but take
up much less memory.
* runtime/pprof: Mutex profile samples are now pre-scaled, fixing an issue
where old mutex profile samples would be scaled incorrectly if the sampling
rate changed during execution.
* runtime/pprof: Profiles collected on Windows now include memory mapping
information that fixes symbolization issues for position-independent
binaries.
* runtime/trace: The garbage collector's background sweeper now yields less
frequently, resulting in many fewer extraneous events in execution traces.
* strings: The new CutPrefix and CutSuffix functions are like TrimPrefix and
TrimSuffix but also report whether the string was trimmed.
* sync: The new Map methods Swap, CompareAndSwap, and CompareAndDelete allow
existing map entries to be updated atomically.
* syscall: On FreeBSD, compatibility shims needed for FreeBSD 11 and earlier
have been removed.
* syscall: On Linux, additional CLONE_* constants are defined for use with the
SysProcAttr.Cloneflags field.
* syscall: On Linux, the new SysProcAttr.CgroupFD and SysProcAttr.UseCgroupFD
fields provide a way to place a child process into a specific cgroup.
* testing: The new method B.Elapsed reports the current elapsed time of the
benchmark, which may be useful for calculating rates to report with
ReportMetric.
* time: The new time layout constants DateTime, DateOnly, and TimeOnly provide
names for three of the most common layout strings used in a survey of public
Go source code.
* time: The new Time.Compare method compares two times.
* time: Parse now ignores sub-nanosecond precision in its input, instead of
reporting those digits as an error.
* time: The Time.MarshalJSON method is now more strict about adherence to RFC
3339.
* unicode/utf16: The new AppendRune function appends the UTF-16 encoding of a
given rune to a uint16 slice, analogous to utf8.AppendRune.
## Patch Instructions:
To install this SUSE Important update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
* openSUSE Leap 15.4
zypper in -t patch openSUSE-SLE-15.4-2023-735=1
* Development Tools Module 15-SP4
zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP4-2023-735=1
## Package List:
* openSUSE Leap 15.4 (ppc64le s390x x86_64)
* go1.20-1.20.2-150000.1.5.1
* openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64)
* go1.20-doc-1.20.2-150000.1.5.1
* openSUSE Leap 15.4 (aarch64 x86_64)
* go1.20-race-1.20.2-150000.1.5.1
* Development Tools Module 15-SP4 (aarch64 ppc64le s390x x86_64)
* go1.20-1.20.2-150000.1.5.1
* go1.20-doc-1.20.2-150000.1.5.1
* Development Tools Module 15-SP4 (aarch64 x86_64)
* go1.20-race-1.20.2-150000.1.5.1
## References:
* https://www.suse.com/security/cve/CVE-2022-41722.html
* https://www.suse.com/security/cve/CVE-2022-41723.html
* https://www.suse.com/security/cve/CVE-2022-41724.html
* https://www.suse.com/security/cve/CVE-2022-41725.html
* https://www.suse.com/security/cve/CVE-2023-24532.html
* https://bugzilla.suse.com/show_bug.cgi?id=1206346
* https://bugzilla.suse.com/show_bug.cgi?id=1208269
* https://bugzilla.suse.com/show_bug.cgi?id=1208270
* https://bugzilla.suse.com/show_bug.cgi?id=1208271
* https://bugzilla.suse.com/show_bug.cgi?id=1208272
* https://bugzilla.suse.com/show_bug.cgi?id=1209030
* https://jira.suse.com/browse/PED-1962
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