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TITLE:
Firefox Sage Extension RSS Feed Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA21839

VERIFY ADVISORY:
http://secunia.com/advisories/21839/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Sage 1.x (extension for Firefox)
http://secunia.com/product/11907/

DESCRIPTION:
pdp has discovered a vulnerability in the Sage extension for Firefox,
which can be exploited by malicious people to conduct cross-site
scripting attacks.

The vulnerability is caused due to an input validation error in the
processing of the content tag in RSS feeds. This can be exploited to
inject and execute arbitrary HTML and script code in a local context
by tricking a user into adding a malicious RSS feed and then viewing
the content of it.

The vulnerability has been confirmed in version 1.3.6. Other versions
may also be affected.

SOLUTION:
Do not add RSS feeds from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
pdp

ORIGINAL ADVISORY:
http://www.gnucitizen.org/blog/cross-context-scripting-with-sage

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About:
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