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Fencer Intel
low 3.6

CVE-2015-3202 json

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 lo…

published 2015-07-02 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3268

cvss
3.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • fuse Debian 13, Debian 12 2.9.3-16
  • ntfs-3g Debian 14, Debian 13, Debian 12 1:2014.2.15AR.3-3

debian advisories DEBIAN-CVE-2015-3202

  • fuse Ubuntu 14.04 LTS 2.9.2-4ubuntu4.14.04.1

ubuntu advisories UBUNTU-CVE-2015-3202

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • fuse SLES for SAP 12, SLES 12, SLED 12 +1 more 2.9.3-5.1

suse advisories SUSE-SU-2015:1053-1

  • fuse openSUSE Tumbleweed 2.9.5-1.6

opensuse advisories openSUSE-SU-2024:10378-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3202 updated cvss 6.0

fuse: incorrect filtering of environment variables leading to privilege escalation

  • Red Hat Enterprise Linux 5 fuse Red Hat Enterprise Linux 6 fuse, fuse-libs Red Hat Enterprise Linux 7 fuse, fuse-libs
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 7 libguestfs-winsupport
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-37089)
  2. Published

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-37089 Fuse 2.9.3-15 - Local Privilege Escalation local, 2015-05-23
  • gist.github.com https://gist.github.com/taviso/ecb70eb12d461dd85cba referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2015/05/21/9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.