DescriptionA code execution vulnerability exists in the directory rehashing functionality of E2fsprogs e2fsck 1.45.4. A specially crafted ext4 directory can cause an out-of-bounds write on the stack, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs948508

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
e2fsprogs (PTS)jessie1.42.12-2vulnerable
jessie (security)1.42.12-2+deb8u1vulnerable
stretch (security)1.43.4-2+deb9u1vulnerable
buster, buster (security)1.44.5-1+deb10u2vulnerable
bullseye, sid1.45.5-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - e2fsprogs <no-dsa> (Minor issue)
[stretch] - e2fsprogs <no-dsa> (Minor issue)
[jessie] - e2fsprogs <no-dsa> (Minor issue; exploit would require providing malicious filesystem)
Fixed by:
Further hardening:

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