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TITLE:
Opera XMLHttpRequest Security Bypass

SECUNIA ADVISORY ID:
SA15008

VERIFY ADVISORY:
http://secunia.com/advisories/15008/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
Opera 8.x
http://secunia.com/product/4932/

DESCRIPTION:
Secunia Research has discovered a vulnerability in Opera, which can
be exploited by malicious people to steal content or to perform
actions on other web sites with the privileges of the user.

Normally, it should not be possible for the XMLHttpRequest object to
access resources from outside the domain of which the object was
opened. However, due to insufficient validation of server side
redirects, it is possible to circumvent this restriction.

The vulnerability has been confirmed in version 8.0.

SOLUTION:
Update to version 8.01.
http://www.opera.com/download/

PROVIDED AND/OR DISCOVERED BY:
Originally discovered in Internet Explorer by:
Jelmer

Dicovered in Opera 8.0 by:
Jakob Balle, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2005-4/advisory/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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