J-Security Center

Title: Opera Error Message History Disclosure Weakness

Severity: MODERATE

Description:

Opera is a web client available for a number of platforms, including Microsoft Windows, Linux, Unix variants and Apple MacOS.

The Opera console is used to keep a track of any JavaScript error messages that may have occured when browsing a Web site.

It has been reported that Opera fails to ensure that a remote site has proper authorization before executing some methods used to access error messages stored in the Opera console. Specifically, Opera does not validate any requests for the opera.errorIndex() and opera.errorMessage(i) methods.

This issue is further exacerbated by the fact that error messages also contain the URL of the site that caused the issue. This can be exploited by a malicious attacker to obtain a listing of the victim user's Web browsing habits for, potentially, malicious purposes.

This vulnerability was reported for Opera 7 browser for Microsoft Windows.

Affected Products:

  • Opera Software Opera Web Browser 7.0.0 win32

References:

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