SUSE-SU-2020:1121-1: moderate: Security update for git

sle-security-updates at sle-security-updates at
Tue Apr 28 04:35:45 MDT 2020

   SUSE Security Update: Security update for git

Announcement ID:    SUSE-SU-2020:1121-1
Rating:             moderate
References:         #1063412 #1095218 #1095219 #1110949 #1112230 
                    #1114225 #1132350 #1149792 #1156651 #1158785 
                    #1158787 #1158788 #1158789 #1158790 #1158791 
                    #1158792 #1158793 #1158795 #1167890 #1168930 
                    #1169605 #1169786 #1169936 
Cross-References:   CVE-2017-15298 CVE-2018-11233 CVE-2018-11235
                    CVE-2018-17456 CVE-2019-1348 CVE-2019-1349
                    CVE-2019-1350 CVE-2019-1351 CVE-2019-1352
                    CVE-2019-1353 CVE-2019-1354 CVE-2019-1387
                    CVE-2019-19604 CVE-2020-11008 CVE-2020-5260
Affected Products:
                    SUSE Linux Enterprise Module for Open Buildservice Development Tools 15-SP1
                    SUSE Linux Enterprise Module for Development Tools 15-SP1
                    SUSE Linux Enterprise Module for Basesystem 15-SP1

   An update that solves 15 vulnerabilities and has 8 fixes is
   now available.


   This update for git fixes the following issues:

   Security issues fixed:

   * CVE-2020-11008: Specially crafted URLs may have tricked the credentials
     helper to providing credential information that is not appropriate for
     the protocol in use and host being contacted (bsc#1169936)

   git was updated to 2.26.1 (bsc#1169786, jsc#ECO-1628, bsc#1149792)

   - Fix git-daemon not starting after conversion from sysvinit to systemd
     service (bsc#1169605).

   * CVE-2020-5260: Specially crafted URLs with newline characters could have
     been used to make the Git client to send credential information for a
     wrong host to the attacker's site bsc#1168930

   git 2.26.0 (bsc#1167890, jsc#SLE-11608):

   * "git rebase" now uses a different backend that is based on the 'merge'
     machinery by default. The 'rebase.backend' configuration variable
     reverts to old behaviour when set to  'apply'
   * Improved handling of sparse checkouts
   * Improvements to many commands and internal features

   git 2.25.2:

   * bug fixes to various subcommands in specific operations

   git 2.25.1:

   * "git commit" now honors advise.statusHints
   * various updates, bug fixes and documentation updates

   git 2.25.0

   * The branch description ("git branch --edit-description") has been used
     to fill the body of the cover letters by the format-patch command; this
     has been enhanced so that the subject can also be filled.
   * A few commands learned to take the pathspec from the standard input
     or a named file, instead of taking it as the command line arguments,
      with the "--pathspec-from-file" option.
   * Test updates to prepare for SHA-2 transition continues.
   * Redo "git name-rev" to avoid recursive calls.
   * When all files from some subdirectory were renamed to the root
     directory, the directory rename heuristics would fail to detect that as
     a rename/merge of the subdirectory to the root directory, which has been
   * HTTP transport had possible allocator/deallocator mismatch, which has
     been corrected.

   git 2.24.1:

   * CVE-2019-1348: The --export-marks option of fast-import is exposed also
     via the in-stream command feature export-marks=... and it allows
     overwriting arbitrary paths (bsc#1158785)
   * CVE-2019-1349: on Windows, when submodules are cloned recursively, under
     certain circumstances Git could be fooled into using the same Git
     directory twice (bsc#1158787)
   * CVE-2019-1350: Incorrect quoting of command-line arguments allowed
     remote code execution during a recursive clone in conjunction with SSH
     URLs (bsc#1158788)
   * CVE-2019-1351: on Windows mistakes drive letters outside of the
     US-English alphabet as relative paths (bsc#1158789)
   * CVE-2019-1352: on Windows was unaware of NTFS Alternate Data Streams
   * CVE-2019-1353: when run in the Windows Subsystem for Linux while
     accessing a working directory on a regular Windows drive, none of the
     NTFS protections were active (bsc#1158791)
   * CVE-2019-1354: on Windows refuses to write tracked files with filenames
     that contain backslashes (bsc#1158792)
   * CVE-2019-1387: Recursive clones vulnerability that is caused by too-lax
     validation of submodule names, allowing very targeted attacks via remote
     code execution in recursive clones (bsc#1158793)
   * CVE-2019-19604: a recursive clone followed by a submodule update could
     execute code contained within the repository without the user explicitly
     having asked for that (bsc#1158795)

   git 2.24.0

   * The command line parser learned "--end-of-options" notation.
   * A mechanism to affect the default setting for a (related) group of
     configuration variables is introduced.
   * "git fetch" learned "--set-upstream" option to help those who first
     clone from their private fork they intend to push to, add the true
     upstream via "git remote add" and then "git fetch" from it.
   * fixes and improvements to UI, workflow and features, bash completion

   git 2.23.0:

   * The "--base" option of "format-patch" computed the patch-ids for
     prerequisite patches in an unstable way, which has been updated to
     compute in a way that is compatible with "git patch-id
   * The "git log" command by default behaves as if the --mailmap
     option was given.
   * fixes and improvements to UI, workflow and features

   git 2.22.1

   * A relative pathname given to "git init --template=<path> <repo>"
     ought to be relative to the directory "git init" gets invoked in, but it
      instead was made relative to the repository, which has been corrected.
   * "git worktree add" used to fail when another worktree connected to the
     same repository was corrupt, which has been corrected.
   * "git am -i --resolved" segfaulted after trying to see a commit as if it
     were a tree, which has been corrected.
   * "git merge --squash" is designed to update the working tree and the
     index without creating the commit, and this cannot be countermanded by
     adding the "--commit" option; the command now refuses to work when both
     options are given.
   * Update to Unicode 12.1 width table.
   * "git request-pull" learned to warn when the ref we ask them to pull from
     in the local repository and in the published repository are different.
   * "git fetch" into a lazy clone forgot to fetch base objects that are
     necessary to complete delta in a thin packfile, which has been corrected.
   * The URL decoding code has been updated to avoid going past the end
     of the string while parsing %-<hex>-<hex> sequence.
   * "git clean" silently skipped a path when it cannot lstat() it; now it
     gives a warning.
   * "git rm" to resolve a conflicted path leaked an internal message "needs
     merge" before actually removing the path, which was confusing. This has
     been corrected.
   * Many more bugfixes and code cleanups.

   - removal of SuSEfirewall2 service, since SuSEfirewall2 has been replaced
     by firewalld.

   - partial fix for git instaweb giving 500 error (bsc#1112230)

   git 2.22.0

   * The filter specification "--filter=sparse:path=<path>" used to create a
     lazy/partial clone has been removed. Using a blob that is part of the
     project as sparse specification is still supported with the
     "--filter=sparse:oid=<blob>" option
   * "git checkout --no-overlay" can be used to trigger a new mode of
     checking out paths out of the tree-ish, that allows paths that match the
     pathspec that are in the current index and working tree and are not in
     the tree-ish.
   * Four new configuration variables {author,committer}.{name,email} have
     been introduced to override user.{name,email} in more specific cases.
   * "git branch" learned a new subcommand "--show-current".
   * The command line completion (in contrib/) has been taught to complete
     more subcommand parameters.
   * The completion helper code now pays attention to repository-local
     configuration (when available), which allows --list-cmds to honour a
     repository specific setting of completion.commands, for example.
   * The list of conflicted paths shown in the editor while concluding a
     conflicted merge was shown above the scissors line when the clean-up
     mode is set to "scissors", even though it was commented
     out just like the list of updated paths and other information to help
      the user explain the merge better.
   * "git rebase" that was reimplemented in C did not set ORIG_HEAD
     correctly, which has been corrected.
   * "git worktree add" used to do a "find an available name with stat and
     then mkdir", which is race-prone. This has been fixed by using mkdir and
     reacting to EEXIST in a loop.

   - Move to DocBook 5.x. Asciidoctor 2.x no longer supports the legacy
     DocBook 4.5 format.

   - update git-web AppArmor profile for bash and tar usrMerge (bsc#1132350)

   git 2.21.0

   * Historically, the "-m" (mainline) option can only be used for "git
     cherry-pick" and "git revert" when working with a merge commit. This
     version of Git no longer warns or errors out when working with a
     single-parent commit, as long as the argument to the "-m" option is 1
     (i.e. it has only one parent, and the request is to pick or revert
     relative to that first parent). Scripts that relied on the behaviour may
     get broken with this change.
   * Small fixes and features for fast-export and fast-import.
   * The "http.version" configuration variable can be used with recent enough
     versions of cURL library to force the version of HTTP used to talk when
     fetching and pushing.
   * "git push $there $src:$dst" rejects when $dst is not a fully qualified
     refname and it is not clear what the end user meant.
   * Update "git multimail" from the upstream.
   * A new date format "--date=human" that morphs its output depending
     on how far the time is from the current time has been introduced.
      "--date=auto:human" can be used to use this new format (or any existing
      format) when the output is going to the pager or to the terminal, and
      otherwise the default format.

   - Fix worktree creation race (bsc#1114225).
   - add shadow build dependency to the -daemon subpackage.

   git 2.20.1:

   * portability fixes
   * "git help -a" did not work well when an overly long alias was defined
   * no longer squelched an error message when the run_command API failed to
     run a missing command

   git 2.20.0

   * "git help -a" now gives verbose output (same as "git help -av"). Those
     who want the old output may say "git help --no-verbose -a"..
   * "git send-email" learned to grab address-looking string on any trailer
     whose name ends with "-by".
   * "git format-patch" learned new "--interdiff" and "--range-diff"
     options to explain the difference between this version and the previous
      attempt in the cover letter (or after the three-dashes as a comment).
   * Developer builds now use -Wunused-function compilation option.
   * Fix a bug in which the same path could be registered under multiple
     worktree entries if the path was missing (for instance, was removed
     manually).  Also, as a convenience, expand the number of cases in which
     --force is applicable.
   * The overly large Documentation/config.txt file have been split into
     million little pieces.  This potentially allows each individual piece to
     be included into the manual page of the command it affects more easily.
   * Malformed or crafted data in packstream can make our code attempt to
     read or write past the allocated buffer and abort, instead of reporting
     an error, which has been fixed.
   * Fix for a long-standing bug that leaves the index file corrupt when it
     shrinks during a partial commit.
   * "git merge" and "git pull" that merges into an unborn branch used to
     completely ignore "--verify-signatures", which has been corrected.
   * ...and much more features and fixes

   git 2.19.2:

   * various bug fixes for multiple subcommands and operations

   git 2.19.1:

   * CVE-2018-17456: Specially crafted .gitmodules files may have allowed
     arbitrary code execution when the repository is cloned with
     --recurse-submodules (bsc#1110949)

   git 2.19.0:

   * "git diff" compares the index and the working tree.  For paths added
     with intent-to-add bit, the command shows the full contents
     of them as added, but the paths themselves were not marked as new
      files.  They are now shown as new by default.
   * "git apply" learned the "--intent-to-add" option so that an
     otherwise working-tree-only application of a patch will add new paths to
      the index marked with the "intent-to-add" bit.
   * "git grep" learned the "--column" option that gives not just the line
     number but the column number of the hit.
   * The "-l" option in "git branch -l" is an unfortunate short-hand for
     "--create-reflog", but many users, both old and new, somehow expect it
     to be something else, perhaps "--list".  This step warns when "-l" is
     used as a short-hand for "--create-reflog" and warns about the future
     repurposing of the it when it is used.
   * The userdiff pattern for .php has been updated.
   * The content-transfer-encoding of the message "git send-email" sends
     out by default was 8bit, which can cause trouble when there is an
     overlong line to bust RFC 5322/2822 limit.  A new option 'auto' to
      automatically switch to quoted-printable when there is such a line in
      the payload has been introduced and is made the default.
   * "git checkout" and "git worktree add" learned to honor
     checkout.defaultRemote when auto-vivifying a local branch out of a
     remote tracking branch in a repository with multiple remotes that have
     tracking branches that share the same names. (merge 8d7b558bae
     ab/checkout-default-remote later to maint).
   * "git grep" learned the "--only-matching" option.
   * "git rebase --rebase-merges" mode now handles octopus merges as well.
   * Add a server-side knob to skip commits in exponential/fibbonacci stride
     in an attempt to cover wider swath of history with a smaller number of
     iterations, potentially accepting a larger packfile transfer, instead of
     going back one commit a time during common ancestor discovery during the
     "git fetch" transaction. (merge 42cc7485a2 jt/fetch-negotiator-skipping
     later to maint).
   * A new configuration variable core.usereplacerefs has been added,
     primarily to help server installations that want to ignore the replace
     mechanism altogether.
   * Teach "git tag -s" etc. a few configuration variables (gpg.format that
     can be set to "openpgp" or "x509", and gpg.<format>.program that is used
     to specify what program to use to deal with the format) to allow x.509
     certs with CMS via "gpgsm" to be used instead of
     openpgp via "gnupg".
   * Many more strings are prepared for l10n.
   * "git p4 submit" learns to ask its own pre-submit hook if it should
     continue with submitting.
   * The test performed at the receiving end of "git push" to prevent bad
     objects from entering repository can be customized via receive.fsck.*
     configuration variables; we now have gained a counterpart to do the same
     on the "git fetch" side, with fetch.fsck.* configuration variables.
   * "git pull --rebase=interactive" learned "i" as a short-hand for
   * "git instaweb" has been adjusted to run better with newer Apache on
     RedHat based distros.
   * "git range-diff" is a reimplementation of "git tbdiff" that lets us
     compare individual patches in two iterations of a topic.
   * The sideband code learned to optionally paint selected keywords at the
     beginning of incoming lines on the receiving end.
   * "git branch --list" learned to take the default sort order from the
     'branch.sort' configuration variable, just like "git tag --list" pays
     attention to 'tag.sort'.
   * "git worktree" command learned "--quiet" option to make it less verbose.

   git 2.18.0:

   * improvements to rename detection logic
   * When built with more recent cURL, GIT_SSL_VERSION can now specify
     "tlsv1.3" as its value.
   * "git mergetools" learned talking to guiffy.
   * various other workflow improvements and fixes
   * performance improvements and other developer visible fixes

   git 2.17.1

   * Submodule "names" come from the untrusted .gitmodules file, but we
     blindly append them to $GIT_DIR/modules to create our on-disk repo
     paths. This means you can do bad things by putting "../" into the name.
     We now enforce some rules for submodule names which will cause Git to
     ignore these malicious names (CVE-2018-11235, bsc#1095219)
   * It was possible to trick the code that sanity-checks paths on NTFS into
     reading random piece of memory (CVE-2018-11233, bsc#1095218)
   * Support on the server side to reject pushes to repositories that attempt
     to create such problematic .gitmodules file etc. as tracked contents, to
     help hosting sites protect their customers by preventing malicious
     contents from spreading.

   git 2.17.0:

   * "diff" family of commands learned "--find-object=<object-id>" option to
     limit the findings to changes that involve the named object.
   * "git format-patch" learned to give 72-cols to diffstat, which is
     consistent with other line length limits the subcommand uses for its
     output meant for e-mails.
   * The log from "git daemon" can be redirected with a new option; one
     relevant use case is to send the log to standard error (instead of
     syslog) when running it from inetd.
   * "git rebase" learned to take "--allow-empty-message" option.
   * "git am" has learned the "--quit" option, in addition to the existing
     "--abort" option; having the pair mirrors a few other commands like
     "rebase" and "cherry-pick".
   * "git worktree add" learned to run the post-checkout hook, just like "git
     clone" runs it upon the initial checkout.
   * "git tag" learned an explicit "--edit" option that allows the message
     given via "-m" and "-F" to be further edited.
   * "git fetch --prune-tags" may be used as a handy short-hand for getting
     rid of stale tags that are locally held.
   * The new "--show-current-patch" option gives an end-user facing way to
     get the diff being applied when "git rebase" (and "git am") stops with a
   * "git add -p" used to offer "/" (look for a matching hunk) as a choice,
     even there was only one hunk, which has been corrected. Also the
     single-key help is now given only for keys that are enabled (e.g. help
     for '/' won't be shown when there is only one hunk).
   * Since Git 1.7.9, "git merge" defaulted to --no-ff (i.e. even when the
     side branch being merged is a descendant of the current commit, create a
     merge commit instead of fast-forwarding) when merging a tag object.
     This was appropriate default for integrators who pull signed tags from
     their downstream contributors, but caused an unnecessary merges when
     used by downstream contributors who habitually "catch up" their topic
     branches with tagged releases from the upstream.  Update "git merge" to
     default to --no-ff only when merging a tag object that does *not* sit at
     its usual place in refs/tags/ hierarchy, and allow fast-forwarding
     otherwise, to mitigate the problem.
   * "git status" can spend a lot of cycles to compute the relation between
     the current branch and its upstream, which can now be disabled with
     "--no-ahead-behind" option.
   * "git diff" and friends learned funcname patterns for Go language source
   * "git send-email" learned "--reply-to=<address>" option.
   * Funcname pattern used for C# now recognizes "async" keyword.
   * In a way similar to how "git tag" learned to honor the pager setting
     only in the list mode, "git config" learned to ignore the pager setting
     when it is used for setting values (i.e. when the purpose of the
     operation is not to "show").

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 Open Buildservice Development Tools 15-SP1:

      zypper in -t patch SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-1121=1

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

      zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP1-2020-1121=1

   - SUSE Linux Enterprise Module for Basesystem 15-SP1:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-1121=1

Package List:

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


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


   - SUSE Linux Enterprise Module for Development Tools 15-SP1 (noarch):


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



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