CVE-2015-3202

FUSE <2.9.3-15 - Local Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2015-3202. PoCs published by Tavis Ormandy.

AI-analyzed exploit summary This exploit leverages CVE-2015-3202, a vulnerability in fusermount where environment variables are not sanitized when calling mount with ruid=0. It overwrites /etc/bash.bashrc to execute a setuid shell script, granting root privileges when root logs in.

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Tavis Ormandy · textlocallinux
https://www.exploit-db.com/exploits/37089

This exploit leverages CVE-2015-3202, a vulnerability in fusermount where environment variables are not sanitized when calling mount with ruid=0. It overwrites /etc/bash.bashrc to execute a setuid shell script, granting root privileges when root logs in.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: fusermount (util-linux)
No auth needed
Prerequisites: Access to a system with vulnerable fusermount · Ability to execute commands
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (22)

Core 22
Core References
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2015/dsa-3268
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2617-1
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159543.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160094.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159831.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1032386
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/74765
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159298.html
Mailing List vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-updates/2015-06/msg00007.html
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2015/dsa-3266
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201603-04
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2617-2
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160106.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159683.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201701-19
Exploit mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2015/05/21/9
Mailing List vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-updates/2015-06/msg00005.html
Various Sources x_refsource_misc
https://twitter.com/taviso/status/601370527437967360
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/37089/
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2617-3

Scores

EPSS 0.0101
EPSS Percentile 58.5%

Details

CWE
CWE-264
Status published
Products (2)
debian/debian_linux 8.0
fuse_project/fuse < 2.9.2
Published Jul 02, 2015
Tracked Since Feb 18, 2026