DescriptionIn fuse before versions 2.9.8 and 3.x before 3.2.5, fusermount is vulnerable to a restriction bypass when SELinux is active. This allows non-root users to mount a FUSE file system with the 'allow_other' mount option regardless of whether 'user_allow_other' is set in the fuse configuration. An attacker may use this flaw to mount a FUSE file system, accessible by other users, and trick them into accessing files on that file system, possibly causing Denial of Service or other unspecified effects.
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)
ReferencesDLA-1468-1, DSA-4257-1
NVD severitymedium (attack range: local)
Debian Bugs904439, 911343

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
fuse (PTS)jessie2.9.3-15+deb8u2vulnerable
jessie (security)2.9.3-15+deb8u3fixed
stretch (security)2.9.7-1+deb9u1fixed
bullseye, sid, buster2.9.9-1fixed
fuse3 (PTS)bullseye, sid, buster3.4.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


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