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2.30.6.txt
Git v2.30.6 Release Notes ========================= This release addresses the security issues CVE-2022-39253 and CVE-2022-39260. Fixes since v2.30.5 ------------------- * CVE-2022-39253: When relying on the `--local` clone optimization, Git dereferences symbolic links in the source repository before creating hardlinks (or copies) of the dereferenced link in the destination repository. This can lead to surprising behavior where arbitrary files are present in a repository's `$GIT_DIR` when cloning from a malicious repository. Git will no longer dereference symbolic links via the `--local` clone mechanism, and will instead refuse to clone repositories that have symbolic links present in the `$GIT_DIR/objects` directory. Additionally, the value of `protocol.file.allow` is changed to be "user" by default. * CVE-2022-39260: An overly-long command string given to `git shell` can result in overflow in `split_cmdline()`, leading to arbitrary heap writes and remote code execution when `git shell` is exposed and the directory `$HOME/git-shell-commands` exists. `git shell` is taught to refuse interactive commands that are longer than 4MiB in size. `split_cmdline()` is hardened to reject inputs larger than 2GiB. Credit for finding CVE-2022-39253 goes to Cory Snider of Mirantis. The fix was authored by Taylor Blau, with help from Johannes Schindelin. Credit for finding CVE-2022-39260 goes to Kevin Backhouse of GitHub. The fix was authored by Kevin Backhouse, Jeff King, and Taylor Blau. Jeff King (2): shell: add basic tests shell: limit size of interactive commands Kevin Backhouse (1): alias.c: reject too-long cmdline strings in split_cmdline() Taylor Blau (11): builtin/clone.c: disallow `--local` clones with symlinks t/lib-submodule-update.sh: allow local submodules t/t1NNN: allow local submodules t/2NNNN: allow local submodules t/t3NNN: allow local submodules t/t4NNN: allow local submodules t/t5NNN: allow local submodules t/t6NNN: allow local submodules t/t7NNN: allow local submodules t/t9NNN: allow local submodules transport: make `protocol.file.allow` be "user" by default
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