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Research > Zero-Day Tracker > 20110121

Opera Browser "select" Element Children Integer Truncation Vulnerability

Date Disclosed:

Date Patched:

Opera Software

Affected Software:
Opera 11.00 and older

Opera contains a vulnerability in opera.dll when handling a HTML "select" element with an excessive number of children; this may be triggered by a maliciously crafted webpage. Successful exploitation could allow remote arbitrary code execution.


Code Execution:

Arbitrary code execution under the current user's context
This client-side vulnerability could allow an attacker to gain the ability to execute remote arbitrary code with the same permissions as the user that is currently logged in. If the user is an administrator, the attacker could install malicious software and further compromise the system.

Upgrade Opera to version 11.01 or newer.


  • eEye's Retina® Network Security Scanner scans devices to detect for this vulnerability. 
    • Retina Audit 14050 - Opera Browser Multiple Vulnerabilities (20110127) - Windows
    • Retina Audit 14051 - Opera Browser Multiple Vulnerabilities (20110127) - Windows x64
    • Retina Audit 14052 - Opera Browser Multiple Vulnerabilities (20110127) - Mac OS X
    • Retina Audit 14053 - Opera Browser Multiple Vulnerabilities (20110127) - UNIX/Linux



  • 1.21.2011 - Public Information Released
  • 1.27.2011 - Vendor Patch Released

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