Bugzilla – Bug 1207364
VUL-0: CVE-2023-22742: libgit2: failure to verify SSH keys by default
Last modified: 2024-05-19 18:44:20 UTC
libgit2, when compiled using the optional, included libssh2 backend, fails to verify SSH keys by default. When using an SSH remote with the optional, included libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the certificate_check field of libgit2's git_remote_callbacks structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Beginning in libgit2 v1.4.5 and v1.5.1, libgit2 will now perform host key checking by default. Users can still override the default behavior using the certificate_check function. Affected versions < 1.4.5, 1.5.0 Patched versions 1.4.5, 1.5.1 References: https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq https://github.com/libgit2/libgit2/releases/tag/v1.5.1 https://github.com/libgit2/libgit2/releases/tag/v1.4.5
TW: https://build.opensuse.org/request/show/1060380
Mike - can you take this one.
SUSE-SU-2023:1570-1: An update that solves one vulnerability can now be installed. Category: security (moderate) Bug References: 1207364 CVE References: CVE-2023-22742 Sources used: openSUSE Leap 15.4 (src): libgit2-0.26.8-150000.3.18.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
SUSE-SU-2023:1788-1: An update that solves one vulnerability can now be installed. Category: security (moderate) Bug References: 1207364 CVE References: CVE-2023-22742 Sources used: openSUSE Leap 15.4 (src): libgit2-1.3.0-150400.3.6.1 Development Tools Module 15-SP4 (src): libgit2-1.3.0-150400.3.6.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
SUSE-SU-2023:1909-1: An update that solves one vulnerability can now be installed. Category: security (moderate) Bug References: 1207364 CVE References: CVE-2023-22742 Sources used: openSUSE Leap 15.4 (src): libgit2-0.28.4-150200.3.6.1 SUSE Manager Server 4.2 Module 4.2 (src): libgit2-0.28.4-150200.3.6.1 SUSE Manager Server 4.3 Module 4.3 (src): libgit2-0.28.4-150200.3.6.1 SUSE Linux Enterprise Real Time 15 SP3 (src): libgit2-0.28.4-150200.3.6.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
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