Description

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Using well-crafted inputs to `git_revparse_single` can cause the function to enter an infinite loop, potentially causing a Denial of Service attack in the calling application. The revparse function in `src/libgit2/revparse.c` uses a loop to parse the user-provided spec string. There is an edge-case during parsing that allows a bad actor to force the loop conditions to access arbitrary memory. Potentially, this could also leak memory if the extracted rev spec is reflected back to the attacker. As such, libgit2 versions before 1.4.0 are not affected. Users should upgrade to version 1.6.5 or 1.7.2.

Classification

CVE ID: CVE-2024-24575

CVSS Base Severity: HIGH

CVSS Base Score: 7.5

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor: libgit2

Product: libgit2

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.36% (probability of being exploited)

EPSS Percentile: 72.6% (scored less or equal to compared to others)

EPSS Date: 2025-03-14 (when was this score calculated)

References

https://github.com/libgit2/libgit2/security/advisories/GHSA-54mf-x2rh-hq9v
https://github.com/libgit2/libgit2/commit/add2dabb3c16aa49b33904dcdc07cd915efc12fa
https://github.com/libgit2/libgit2/releases/tag/v1.6.5
https://github.com/libgit2/libgit2/releases/tag/v1.7.2
https://lists.fedoraproject.org/archives/list/[email protected]/message/S635BGHHZUMRPI7QOXOJ45QHDD5FFZ3S/
https://lists.fedoraproject.org/archives/list/[email protected]/message/4M3P7WIEPXNRLBINQRJFXUSTNKBCHYC7/
https://lists.fedoraproject.org/archives/list/[email protected]/message/7CNDW3PF6NHO7OXNM5GN6WSSGAMA7MZE/
https://lists.fedoraproject.org/archives/list/[email protected]/message/Z6MXOX7I43OWNN7R6M54XLG6U5RXY244/
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZGNHOEE2RBLH7KCJUPUNYG4CDTW4HTBT/

Timeline