cman fence_egenera symlink

cman-fenceegenera-symlink (44845) The risk level is classified as MediumMedium Risk

Description:

cman could allow a local attacker to launch a symlink attack. The fence_egenera script creates temporary files insecurely. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to other files on the system, which would allow the attacker to overwrite arbitrary files on the system with elevated privileges.

*CVSS:

Base Score: 3.3
  Access Vector: Local
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 2.7
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Uncorroborated

Consequences:

File Manipulation

Remedy:

Apply the appropriate patch for your system. See References.

References:

  • cman Web page: Package: cman (1.03.00-2) .
  • Debian Bug report logs - #496410: The possibility of attack with the help of symlinks in some Debian packages.
  • Dmitry E. Oboukhov Advisory: Package: cman .
  • BID-30898: cman 'fence_egenera' Insecure Temporary File Creation Vulnerability
  • CVE-2008-4192: The pserver_shutdown function in fence_egenera in cman 2.20080629 and 2.20080801 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/eglog temporary file.
  • OSVDB ID: 48268: cman fence_egenera pserver_shutdown Function Temporary File Symlink Arbitrary File Overwrite
  • RHSA-2011-0266: Low: fence security, bug fix, and enhancement update
  • SA31887: Cluster Project CMAN "fence_egenera" Insecure Temporary Files
  • USN-875-1: Red Hat Cluster Suite vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 8.04 LTS
  • Canonical Ubuntu 8.10
  • Debain CMAN 2.03.07
  • RedHat RHEL Cluster 4

Reported:

Aug 24, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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