Opera Bugs Permit Cross-Site Scripting and Denial of Service Attacks
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SecurityTracker Alert ID: 1025735 |
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SecurityTracker URL: http://securitytracker.com/id/1025735
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CVE Reference:
GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Jun 29 2011
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Impact:
Denial of service via network, Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, Not specified
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 11.50
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Description:
Several vulnerabilities were reported in Opera. A remote user can cause denial of service conditions. A remote user can conduct cross-site scripting attacks. The impact of one vulnerability was not disclosed.
The software does not properly enforce security restrictions on data URIs. On certain sites, a remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will run in the security context of the target site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Michal Zalewski of the Google Security Team reported this vulnerability.
A remote user can send specially crafted data to cause the target service to crash.
A remote user can create a large number of invalid URLs to cause the target user's browser to consume all available disk space creating error pages for each invalid URL, causing either the browser or operating system to crash. The files are not removed upon restart, causing the system to remain disabled.
JPCERT reported this vulnerability.
An unspecified flaw exists. The vendor has described the flaw as 'moderately severe'.
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Impact:
A remote user can cause excessive disk space consumption on the target user's system.
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the target site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
The impact of one vulnerability was not disclosed.
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Solution:
The vendor has issued a fix (11.50).
The vendor's advisories are available at:
http://www.opera.com/docs/changelogs/unix/1150/
http://www.opera.com/docs/changelogs/mac/1150/
http://www.opera.com/docs/changelogs/windows/1150/
http://www.opera.com/support/kb/view/995/
http://www.opera.com/support/kb/view/996/
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Vendor URL: www.opera.com/docs/changelogs/windows/1150/ (Links to External Site)
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Cause:
Access control error, Not specified, Resource error
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Underlying OS:
Linux (Any), UNIX (Any), UNIX (OS X), Windows (Any)
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Message History:
None.
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Source Message Contents
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Date: Wed, 29 Jun 2011 05:12:46 +0000
Subject: Opera
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http://www.opera.com/docs/changelogs/unix/1150/
http://www.opera.com/docs/changelogs/mac/1150/
http://www.opera.com/docs/changelogs/windows/1150/
http://www.opera.com/support/kb/view/995/
http://www.opera.com/support/kb/view/996/
Fixed a moderately severe issue. Details will be disclosed at a later date.
Fixed an issue where data URIs could be used to initiate cross site scripting
against unrelated sites, as reported by Michal Zalewski of the Google Security Team;
see our advisory.
Fixed an issue with error pages that could cause a system crash, as reported
through JPCERT; see our advisory.
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