Headline
CVE-2023-25652: Git 2.30.9 · git/git@668f2d5
Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, by feeding specially crafted input to git apply --reject
, a path outside the working tree can be overwritten with partially controlled contents (corresponding to the rejected hunk(s) from the given patch). A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid using git apply
with --reject
when applying patches from an untrusted source. Use git apply --stat
to inspect a patch before applying; avoid applying one that create a conflict where a link corresponding to the *.rej
file exists.
@@ -0,0 +1,43 @@
Git v2.30.9 Release Notes
=========================
This release addresses the security issues CVE-2023-25652,
CVE-2023-25815, and CVE-2023-29007.
Fixes since v2.30.8
-------------------
* CVE-2023-25652:
By feeding specially crafted input to `git apply --reject`, a
path outside the working tree can be overwritten with partially
controlled contents (corresponding to the rejected hunk(s) from
the given patch).
* CVE-2023-25815:
When Git is compiled with runtime prefix support and runs without
translated messages, it still used the gettext machinery to
display messages, which subsequently potentially looked for
translated messages in unexpected places. This allowed for
malicious placement of crafted messages.
* CVE-2023-29007:
When renaming or deleting a section from a configuration file,
certain malicious configuration values may be misinterpreted as
the beginning of a new configuration section, leading to arbitrary
configuration injection.
Credit for finding CVE-2023-25652 goes to Ry0taK, and the fix was
developed by Taylor Blau, Junio C Hamano and Johannes Schindelin,
with the help of Linus Torvalds.
Credit for finding CVE-2023-25815 goes to Maxime Escourbiac and
Yassine BENGANA of Michelin, and the fix was developed by Johannes
Schindelin.
Credit for finding CVE-2023-29007 goes to André Baptista and Vítor Pinho
of Ethiack, and the fix was developed by Taylor Blau, and Johannes
Schindelin, with help from Jeff King, and Patrick Steinhardt.
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In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a consequence, Git is expected not to localize messages at all, and skips the gettext initialization. However, due to a change in MINGW-packages, the `gettext()` function's implicit initialization no longer uses the runtime prefix but uses the hard-coded path `C:\mingw64\share\locale` to look for localized messages. And since any authenticated user has the permission to create folders in `C:\` (and since `C:\mingw64` does not typically exist), it is possible for low-privilege users to place fake messages in that location where `git.exe` will pick them up in version 2.40.1. This vulnerability is relatively hard to exploit and requires social engineering. For example, a legitimate message at the end of a clone could be maliciously modified to ask the user to direct their web browser to a malicious website, and the user might think that the message comes from Git and is legitimate. It do...
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