Git is an open source, scalable, distributed revision control system. `git shell` is a restricted login shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments into an array improperly uses an `int` to represent the number of entries in the array, allowing a malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the resulting array is then passed to `execv()`, it is possible to leverage this attack to gain remote code execution on a victim machine. Note that a victim must first allow access to `git shell` as a login shell in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version. Disabling `git shell` access via remote logins is a viable short-term workaround. https://github.com/git/git/security/advisories/GHSA-rjr6-wcq6-83p6
Created git tracking bugs for this issue: Affects: fedora-all [bug 2137427]
Fixes were pushed to bodhi before this ticket was filed, so it should be closed manually.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2023:2319 https://access.redhat.com/errata/RHSA-2023:2319
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:2859 https://access.redhat.com/errata/RHSA-2023:2859
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2022-39260
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:0407 https://access.redhat.com/errata/RHSA-2024:0407