Yoono extension for Firefox DOM event cross-site scripting

yoonoo-domevent-xss (54417) The risk level is classified as MediumMedium Risk

Description:

The Yoono extension for Firefox is vulnerable to cross-site scripting, caused by improper validation of user-supplied input when processing DOM event handlers such as onLoad tags. A remote attacker could exploit this vulnerability using the onload tag to inject malicious script into a Web page which would be executed in a victim's Web browser in the "chrome:" context, if the attacker could persuade the victim to load a specially-crafted RSS feed. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.

*CVSS:

Base Score: 2.6
  Access Vector: Network
  Access Complexity: High
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 2.3
  Exploitability: High
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Yoono (6.1.1 or later), available from the Mozilla Web site. See References.

References:

  • Help Net Security Web Site: Zero-day vulnerabilities in Firefox extensions discovered.
  • Mozilla Web site: Yoono - Socialize Your Browser.
  • BID-37123: Mozilla Firefox Yoono Extension DOM Event Handler Cross Domain Scripting Vulnerability
  • CVE-2009-4100: Yoono extension before 6.1.1 for Firefox performs certain operations with chrome privileges, which allows user-assisted remote attackers to execute arbitrary commands and perform cross-domain scripting attacks via DOM event handlers such as onload.
  • OSVDB ID: 60530: Yoono Extension for Firefox DOM Event Handling chrome: Cross-context Arbitrary Code Execution
  • SA37468: Firefox Yoono Extension Cross-Context Scripting Vulnerability
  • VUPEN/ADV-2009-3326: Yoono Extension for Firefox onLoad Script Injection Vulnerability

Platforms Affected:

  • Mozilla Yoono extension for Firefox 6.1.0

Reported:

Nov 24, 2009

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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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