CVE-2015-3202

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://www.suse.com/security/cve/CVE-2015-3202.html
• 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
• http://www.securityfocus.com/bid/74765
• http://www.securitytracker.com/id/1032386
• http://www.ubuntu.com/usn/USN-2617-1
• http://www.ubuntu.com/usn/USN-2617-2
• http://www.ubuntu.com/usn/USN-2617-3
• https://gist.github.com/taviso/ecb70eb12d461dd85cba
• https://security.gentoo.org/glsa/201603-04
• https://security.gentoo.org/glsa/201701-19
• https://twitter.com/taviso/status/601370527437967360
• https://www.exploit-db.com/exploits/37089/
• https://security-tracker.debian.org/tracker/CVE-2015-3202

CWEs

CWE-264