70520 : Fuse fusermount Arbitrary Unmount Local DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2011-01-19

Description

FUSE contains a flaw that may allow a local denial of service. The issue is triggered when an error within the 'fusermount' utility when performing unmount operations occurs, allowing a local attacker to cause a denial of service by unmounting arbitrary mounts via symlink attacks.

Classification

Location: Local Access Required
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Patch / RCS
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, various distributions have released patches to address this vulnerability.

Products

dzsekijo and mszeredi

FUSE

2.8.5

References

CVE ID: 2010-3879 (see also: NVD)
Secunia Advisory ID: 42961 42965 43958 45350
Bugtraq ID: 44623
ISS X-Force ID: 62986
VUPEN Advisory: ADV-2011-0181
Vendor Specific News/Changelog Entry: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=602333
https://bugs.launchpad.net/bugs/670622
https://bugzilla.novell.com/show_bug.cgi?id=651598
https://bugzilla.redhat.com/show_bug.cgi?id=651183
https://lists.ubuntu.com/archives/ubuntu-security-announce/2011-January/001230.html
https://lists.ubuntu.com/archives/ubuntu-security-announce/2011-January/001231.html
Mail List Post: http://lists.grok.org.uk/pipermail/full-disclosure/2010-November/077247.html
Other Advisory URL: http://openwall.com/lists/oss-security/2010/11/04/8
http://openwall.com/lists/oss-security/2010/11/05/2
http://www.halfdog.net/Security/FuseTimerace/
http://www.ubuntu.com/usn/USN-1045-1
http://www.ubuntu.com/usn/USN-1045-2
Vendor Specific Advisory URL: https://hermes.opensuse.org/messages/7770240
RedHat RHSA: https://rhn.redhat.com/errata/RHSA-2011-1083.html

Credit

halfdog - halfdog.net

CVSSv2 Score

CVSSv2 Base Score = 5.8
Source: nvd.nist.gov | Generated: 2011-01-24 | Disagree?

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