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Fencer Intel
medium 5.8

CVE-2010-3879 json

FUSE, possibly 2.8.5 and earlier, allows local users to create mtab entries with arbitrary pathnames, and consequently unmount any filesyst…

published 15y ago modified 4mo ago also EUVD-2010-3857

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.8%
EPSS 9.8% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

FUSE, possibly 2.8.5 and earlier, allows local users to create mtab entries with arbitrary pathnames, and consequently unmount any filesystem, via a symlink attack on the parent directory of the mountpoint of a FUSE filesystem, a different vulnerability than CVE-2010-0789.

Patch / fix

  • fuse Debian 13, Debian 12 2.8.5-1

debian advisories DEBIAN-CVE-2010-3879

  • fuse RHEL 6 2.8.3-3.el6_1
  • fuse-libs RHEL 6 2.8.3-3.el6_1

red hat advisories RHSA-2011:1083

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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-2010-3879 updated cvss 2.6

fuse: unprivileged user can unmount arbitrary locations via symlink attack

  • Red Hat Enterprise Linux 5 fuse, util-linux
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 6 uuidd, libuuid, libblkid, util-linux-ng
    affected: no fix available
  • Red Hat Enterprise Linux Server (v. 6) fuse 2.8.3-3.el6_1, fuse-libs 2.8.3-3.el6_1
    fixed: vendor fix RHSA-2011:1083

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-34953)
  2. Published

Exploit prediction

9.85% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-34953 FUSE fusermount Tool - Race Condition dos, 2010-11-02
  • halfdog.net http://www.halfdog.net/Security/FuseTimerace/ referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=651183 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.debian.org http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=602333 referenced PoC, tagged "exploit" by a source, unverified
  • lists.grok.org.uk http://lists.grok.org.uk/pipermail/full-disclosure/2010-November/077247.html referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://openwall.com/lists/oss-security/2010/11/04/8 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.novell.com https://bugzilla.novell.com/show_bug.cgi?id=651598 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.launchpad.net https://bugs.launchpad.net/bugs/670622 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/44623 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://openwall.com/lists/oss-security/2010/11/05/2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

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.