What’s Vulnerable › Vulnerabilities

CVE-2020-12279

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-27 · updated 2026-06-17
• Weakness: CWE-706

Description

An issue was discovered in libgit2 before 0.28.4 and 0.9x before 0.99.0. checkout.c mishandles equivalent filenames that exist because of NTFS short names. This may allow remote code execution when cloning a repository. This issue is similar to CVE-2019-1353.

Affected products

• Debian Linux: 9.0
• libgit2: before 0.28.4 — fixed in 0.28.4

How to fix

Upgrade to a fixed version: libgit2 0.28.4. Check the vendor advisory for mitigations.

References

• https://github.com/git/git/security/advisories/GHSA-589j-mmg9-733v
• https://github.com/libgit2/libgit2/commit/64c612cc3e25eff5fb02c59ef5a66ba7a14751e4
• https://github.com/libgit2/libgit2/releases/tag/v0.28.4
• https://github.com/libgit2/libgit2/releases/tag/v0.99.0
• https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html
• https://lists.debian.org/debian-lts-announce/2023/02/msg00034.html
• https://github.com/git/git/security/advisories/GHSA-589j-mmg9-733v
• https://github.com/libgit2/libgit2/commit/64c612cc3e25eff5fb02c59ef5a66ba7a14751e4
• https://github.com/libgit2/libgit2/releases/tag/v0.28.4
• https://github.com/libgit2/libgit2/releases/tag/v0.99.0
• https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html
• https://lists.debian.org/debian-lts-announce/2023/02/msg00034.html

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