Apache Subversion svnserve daemon symlink

apache-subversion-cve20134277-symlink (86972) The risk level is classified as MediumMedium Risk

Description:

Apache Subversion could allow a local attacker to launch a symlink attack. The svnserve daemon creates temporary files insecurely. A local attacker could exploit this vulnerability by creating a symbolic link from a temporary file to various files on the system, which could 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: 2.9
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

File Manipulation

Remedy:

Upgrade to the latest version of Subversion (1.7.13 or 1.8.3 or later), available from the Apache Web site. See References.

References:

  • Apache Web site: svnserve is vulnerable to a local privilege escalation vulnerability via symlink attack..
  • Red Hat Bugzilla Bug 1000202: CVE-2013-4277 subversion: svnserve is vulnerable to symlink attack.
  • BID-62266: Apache Subversion CVE-2013-4277 Insecure Temporary File Creation Vulnerability
  • CVE-2013-4277: Svnserve in Apache Subversion 1.4.0 through 1.7.12 and 1.8.0 through 1.8.1 allows local users to overwrite arbitrary files or kill arbitrary processes via a symlink attack on the file specified by the --pid-file option.

Platforms Affected:

  • Apache Subversion 1.7.0
  • Apache Subversion 1.7.1
  • Apache Subversion 1.7.10
  • Apache Subversion 1.7.2
  • Apache Subversion 1.7.3

Reported:

Sep 07, 2013

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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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