CVE-2015-3202

Severity: low (CVSS 3.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2015-07-02 · updated 2026-06-17
Weakness: CWE-264

Description

fusermount in FUSE before 2.9.3-15 does not properly clear the environment before invoking (1) mount or (2) umount as root, which allows local users to write to arbitrary files via a crafted LIBMOUNT_MTAB environment variable that is used by mount's debugging feature.

Affected products

Debian Linux: 8.0
Fuse Project Fuse: through 2.9.2

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159298.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159543.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159683.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159831.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160094.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160106.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00005.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00007.html
http://packetstormsecurity.com/files/132021/Fuse-Local-Privilege-Escalation.html
http://www.debian.org/security/2015/dsa-3266
http://www.debian.org/security/2015/dsa-3268
http://www.openwall.com/lists/oss-security/2015/05/21/9

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