Title: Opera Skin Zip File Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
Opera is a web browser available for a number of operating systems, including the Microsoft Windows, Linux, Unix, and Apple MacOS platforms.
A problem has been identified in the handling of zipped skin files by Opera. Because of this, it may be possible for an attacker to gain unauthorized access to a system using the vulnerable browser.
The problem is in the handling of specially crafted zip files. When a skin zip file with data appended after the zipped data is downloaded by Opera, the data contained after the zip data results in a boundary condition error. This could be exploited to overwrite sensitive process memory, potentially resulting in the modifying of program flow and execution of attacker-supplied instructions.
It should be noted that exploitation of this vulnerability may result in the execution of code with the privileges of the Opera browser user.
Affected Products:
- Opera Software Opera Web Browser 7.22.0
References:
- Opera Software: Changelog for Opera 7.23 for Windows
- Opera Software: Opera Web Browser Home Page
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