TITLE:
Opera "data:" URI Handler Spoofing Vulnerability

SECUNIA ADVISORY ID:
SA13818

VERIFY ADVISORY:
http://secunia.com/advisories/13818/

CRITICAL:
Moderately critical

IMPACT:
Spoofing

WHERE:
>From remote

SOFTWARE:
Opera 7.x
http://secunia.com/product/761/
Opera 6.x
http://secunia.com/product/81/
Opera 5.x
http://secunia.com/product/82/

DESCRIPTION:
Michael Holzt has discovered a vulnerability in Opera, which can be
exploited by malicious people to trick users into executing malicious
files.

The vulnerability is caused due to an error in the processing of
"data:" URIs, causing wrong information to be shown in a download
dialog. This can be exploited by e.g. a malicious website to trick
users into executing a malicious file by supplying a specially
crafted "data:" URI.

The vulnerability has been confirmed on version 7.54u1 for Windows.
Other versions may also be affected.

SOLUTION:
Do not open files from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
Michael Holzt

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