Opera SELECT denial of service

opera-select-dos (67338) The risk level is classified as MediumMedium Risk

Description:

Opera is vulnerable to a denial of service, caused by an error when handling malformed tags. By persuading a victim to view a specially-crafted Web page with an overly large SIZE parameter embedded in SELECT HTML tags, a remote attacker could exploit this vulnerability to crash the browser or possibly execute arbitrary code on the system.

*CVSS:

Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Opera (10.61 or 11.10 or later), available from the Opera Web site. See References.

References:

  • Opera Web site: Download Opera Browser.
  • TSSA-2011-02: Opera : SELECT SIZE Arbitrary null write .
  • BID-47764: Opera Web Browser 'SELECT' HTML Tag Remote Memory Corruption Vulnerability
  • CVE-2011-1824: The VEGAOpBitmap::AddLine function in Opera before 10.61 does not properly initialize memory during processing of the SIZE attribute of a SELECT element, which allows remote attackers to trigger an invalid memory write operation, and consequently cause a denial of service (application crash) or possibly execute arbitrary code, via a large integer attribute value.
  • OSVDB ID: 74176: Opera VEGAOpBitmap::AddLine Function SELECT Element Invalid Memory Write DoS

Platforms Affected:

  • Opera Opera Browser 10.60

Reported:

May 03, 2011

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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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