SUSE-SU-2020:2776-1: moderate: Security update for go1.15

sle-security-updates at sle-security-updates at
Tue Sep 29 07:14:27 MDT 2020

   SUSE Security Update: Security update for go1.15

Announcement ID:    SUSE-SU-2020:2776-1
Rating:             moderate
References:         #1170826 #1175132 #1176031 ECO-1484 
Cross-References:   CVE-2020-24553
Affected Products:
                    SUSE Linux Enterprise Module for Development Tools 15-SP2
                    SUSE Linux Enterprise Module for Development Tools 15-SP1

   An update that solves one vulnerability, contains one
   feature and has two fixes is now available.


   go1.15 (released 2020-08-11) Go 1.15 is a major release of Go.

   go1.15.x minor releases will be provided through August 2021.

   Most 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.

   * See release notes Excerpts relevant to
     OBS environment and for SUSE/openSUSE follow:
   * Module support in the go command is ready for production use, and we
     encourage all users to migrate to Go modules for dependency management.
   * Module cache: The location of the module cache may now be set with the
     GOMODCACHE environment variable. The default value of GOMODCACHE is
     GOPATH[0]/pkg/mod, the location of the module cache before this change.
   * Compiler flag parsing: Various flag parsing issues in go test and go vet
     have been fixed. Notably, flags specified in GOFLAGS are handled more
     consistently, and the -outputdir flag now interprets relative paths
     relative to the working directory of the go command (rather than the
     working directory
     of each individual test).
   * The GOPROXY environment variable now supports skipping proxies that
     return errors. Proxy URLs may now be separated with either commas (,) or
     pipe characters (|). If a proxy URL is followed by a comma, the go
     command will only try the next proxy in the list after a 404 or 410 HTTP
     response. If a proxy URL is followed by a pipe character, the go command
     will try the next proxy in the list after any error. Note that the
     default value of GOPROXY remains,direct, which
     does not fall back to direct in case of errors.
   * On a Unix system, if the kill command or kill system call is used to
     send a SIGSEGV, SIGBUS, or SIGFPE signal to a Go program, and if the
     signal is not being handled via
     os/signal.Notify, the Go program will now reliably crash with a stack
      trace. In earlier releases the behavior was unpredictable.
   * Allocation of small objects now performs much better at high core
     counts, and has lower worst-case latency.
   * Go 1.15 reduces typical binary sizes by around 5% compared to Go 1.14 by
     eliminating certain types of GC metadata and more aggressively
     eliminating unused type metadata.
   * The toolchain now mitigates Intel CPU erratum SKX102 on GOARCH=amd64 by
     aligning functions to 32 byte boundaries and padding jump instructions.
     While this padding increases binary sizes, this is more than made up for
     by the binary size improvements mentioned above.
   * Go 1.15 adds a -spectre flag to both the compiler and the assembler, to
     allow enabling Spectre mitigations. These should almost never be needed
     and are provided mainly as a "defense in depth" mechanism. See the
     Spectre Go wiki page for details.
   * The compiler now rejects //go: compiler directives that have no meaning
     for the declaration they are applied to with a "misplaced compiler
     directive" error. Such misapplied directives were broken before, but
     were silently ignored by the compiler.
   * Substantial improvements to the Go linker, which reduce linker resource
     usage (both time and memory) and improve code
     robustness/maintainability. Linking is 20% faster and requires 30% less
     memory on average. These changes are part of a multi-release project to
     modernize the Go linker, meaning that there will be additional linker
     improvements expected in future releases.
   * The linker now defaults to internal linking mode for
     -buildmode=pie on linux/amd64 and linux/arm64, so these configurations
      no longer require a C linker.
   * There has been progress in improving the stability and performance of
     the 64-bit RISC-V port on Linux (GOOS=linux, GOARCH=riscv64). It also
     now supports asynchronous preemption.
   * crypto/x509: The deprecated, legacy behavior of treating the CommonName
     field on X.509 certificates as a host name when no Subject Alternative
     Names are present is now disabled by default. It can be temporarily
     re-enabled by adding the value x509ignoreCN=0 to the GODEBUG environment
     variable. Note that if the CommonName is an invalid host name, it's
     always ignored, regardless of GODEBUG settings. Invalid names include
     those with any characters other than letters, digits, hyphens and
     underscores, and those with empty labels or trailing dots.
   * crypto/x509: go1.15 applications with an AWS DB instance that was
     created or updated to the rds-ca-2019 certificate prior to July 28,
     2020, you must update the certificate again. If you created your DB
     instance or updated its certificate after July 28, 2020, no action is
     required. For more information, see go#39568

   This update ships go1.15.2 (released 2020-09-09) includes fixes to the
   compiler, runtime, documentation, the go command, and the net/mail, os,
   sync, and testing packages.

   * go#41193 net/http/fcgi: race detected during execution of
     TestResponseWriterSniffsContentType test
   * go#41178 doc: include fix for #34437 in Go 1.14 release notes
   * go#41034 testing: Cleanup races with Logf and Errorf
   * go#41011 sync: sync.Map keys will never be garbage collected
   * go#40934 runtime: checkptr incorrectly -race flagging when using &^
   * go#40900 internal/poll: CopyFileRange returns EPERM on CircleCI Docker
     Host running 4.10.0-40-generic
   * go#40868 cmd/compile: R12 can be clobbered for write barrier call on
   * go#40849 testing: "=== PAUSE" lines do not change the test name for the
     next log line
   * go#40845 runtime: Panic if newstack at runtime.acquireLockRank
   * go#40805 cmd/test2json: tests that panic are marked as passing
   * go#40804 net/mail: change in behavior of ParseAddressList("") in 1.15
   * go#40802 cmd/go: in 1.15: change in "go test" argument parsing
   * go#40798 cmd/compile: inline marker targets not reachable after assembly
     on arm
   * go#40772 cmd/compile: compiler crashes in ssa: isNonNegative bad type
   * go#40767 cmd/compile: inline marker targets not reachable after assembly
     on ppc64x
   * go#40739 internal/poll: CopyFileRange returns ENOTSUP on Linux 3.10.0
     kernel on NFS mount
   * go#40412 runtime: Windows service lifecycle events behave incorrectly
     when called within a golang environment

   go1.15.1 (released 2020-09-01) includes security fixes to the net/http/cgi
   and net/http/fcgi packages.

   * bsc#1176031 CVE-2020-24553: go net/http/cgi,net/http/fcgi: Cross-Site
     Scripting (XSS) when Content-Type is not specified
   * go#41165 net/http/cgi,net/http/fcgi: Cross-Site Scripting (XSS) when
     Content-Type is not specified

Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Module for Development Tools 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP2-2020-2776=1

   - SUSE Linux Enterprise Module for Development Tools 15-SP1:

      zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP1-2020-2776=1

Package List:

   - SUSE Linux Enterprise Module for Development Tools 15-SP2 (aarch64 ppc64le s390x x86_64):


   - SUSE Linux Enterprise Module for Development Tools 15-SP1 (aarch64 ppc64le s390x x86_64):



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