CVE-2026-54576
5.8
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Summary
mport is the MidnightBSD Package Manager. Prior to 2.7.8, do_actual_install() in libmport/bundle_read_install_pkg.c used path-based lstat(), chown(), stat(), and chmod() operations while installing package files. A local attacker with write access to a target directory could replace a checked file with a symlink before privileged ownership or mode changes were applied, redirecting those changes to an attacker-selected path and compromising filesystem integrity or permissions. This issue is fixed in version 2.7.8.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MidnightBSD | mport | < 2.7.8 | affected |
Weaknesses
- CWE-59: CWE-59: Improper Link Resolution Before File Access ('Link Following')
- CWE-367: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
References
- https://github.com/MidnightBSD/mport/security/advisories/GHSA-23g3-7fv3-3ccf
- https://github.com/MidnightBSD/mport/pull/150
- https://github.com/MidnightBSD/mport/commit/4676ac05b1056b54a3d38d03ae8a478bf12c9abe
- https://github.com/MidnightBSD/mport/releases/tag/2.7.8
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