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65 lines
2.5 KiB
Text
65 lines
2.5 KiB
Text
Git 2.37.4 Release Notes
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========================
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This primarily is to backport various fixes accumulated on the 'master'
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front since 2.37.3, and also includes the same security fixes as in
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v2.30.6.
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Fixes since v2.37.3
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-------------------
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* CVE-2022-39253:
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When relying on the `--local` clone optimization, Git dereferences
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symbolic links in the source repository before creating hardlinks
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(or copies) of the dereferenced link in the destination repository.
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This can lead to surprising behavior where arbitrary files are
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present in a repository's `$GIT_DIR` when cloning from a malicious
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repository.
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Git will no longer dereference symbolic links via the `--local`
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clone mechanism, and will instead refuse to clone repositories that
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have symbolic links present in the `$GIT_DIR/objects` directory.
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Additionally, the value of `protocol.file.allow` is changed to be
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"user" by default.
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Credit for finding CVE-2022-39253 goes to Cory Snider of Mirantis.
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The fix was authored by Taylor Blau, with help from Johannes
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Schindelin.
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* CVE-2022-39260:
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An overly-long command string given to `git shell` can result in
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overflow in `split_cmdline()`, leading to arbitrary heap writes and
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remote code execution when `git shell` is exposed and the directory
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`$HOME/git-shell-commands` exists.
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`git shell` is taught to refuse interactive commands that are
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longer than 4MiB in size. `split_cmdline()` is hardened to reject
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inputs larger than 2GiB.
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Credit for finding CVE-2022-39260 goes to Kevin Backhouse of
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GitHub. The fix was authored by Kevin Backhouse, Jeff King, and
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Taylor Blau.
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* An earlier optimization discarded a tree-object buffer that is
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still in use, which has been corrected.
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* Fix deadlocks between main Git process and subprocess spawned via
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the pipe_command() API, that can kill "git add -p" that was
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reimplemented in C recently.
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* xcalloc(), imitating calloc(), takes "number of elements of the
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array", and "size of a single element", in this order. A call that
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does not follow this ordering has been corrected.
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* The preload-index codepath made copies of pathspec to give to
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multiple threads, which were left leaked.
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* Update the version of Ubuntu used for GitHub Actions CI from 18.04
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to 22.04.
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* The auto-stashed local changes created by "git merge --autostash"
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was mixed into a conflicted state left in the working tree, which
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has been corrected.
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Also contains other minor documentation updates and code clean-ups.
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