Authen::ExternalAuth extension for RT URL security bypass

authenexternalauth-url-sec-bypass (77213) The risk level is classified as MediumMedium Risk

Description:

The Authen::ExternalAuth extension for RT could allow a remote attacker to bypass security restrictions, caused by the improper handling of the URLs of RSS feeds. An attacker could exploit this vulnerability to gain a logged-in session of a user hosting a RSS feed.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Refer to Best Practical Web site for patch, upgrade or suggested workaround information. See References.

References:

  • Best Practical Web site: Best Practical.
  • BID-54681: RT::Authen::ExternalAuth Extension Security Bypass Vulnerability
  • CVE-2012-2770: The Authen::ExternalAuth extension before 0.11 for Best Practical Solutions RT allows remote attackers to obtain a logged-in session via unspecified vectors related to the URL of a RSS feed of the user.
  • OSVDB ID: 84246: Authen::ExternalAuth Extension for RT RSS Feed URL Handling RSS Host Session Hijacking
  • SA50060: RT Authen::ExternalAuth Extension Security Bypass Vulnerability

Platforms Affected:

  • Best Practical Solutions Authen::ExternalAuth extension for RT 0.10

Reported:

Jul 26, 2012

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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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