mount-cifs: Multiple vulnerabilites

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201206-29 / mount-cifs
Release Date	June 25, 2012
Latest Revision	June 25, 2012: 1
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-fs/mount-cifs	< 3.4.6	>= 3.4.6	All supported architectures

Related bugreports: #308067

Synopsis

Multiple vulnerabilities were found in mount-cifs, the worst of which leading to privilege escalation.

2. Impact Information

Background

mount-cifs is the cifs filesystem mount helper split from Samba.

Description

Multiple vulnerabilities have been discovered in mount-cifs. Please review the CVE identifiers referenced below for details.

Impact

The vulnerabilities allow local users to cause a denial of service (mtab corruption) via a crafted string. Also, local users could mount a CIFS share on an arbitrary mountpoint, and gain privileges via a symlink attack on the mountpoint directory file.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All mount-cifs users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-fs/mount-cifs-3.4.6"

4. References

Page updated June 25, 2012

Summary: This is a Gentoo Linux Security Advisory

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