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SquirrelMail Address Add Plugin XSS
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SUMMARY
A XSS vulnerability has been detected in the Address Add Plugin for
Squirrelmail. The problem is caused by insufficient input sanitation.
DETAILS
Vulnerable Systems:
* Squirrelmail version 1.4.0 or newer with Address Add Plugin version 1.9
or 2.0
Immune Systems:
* Squirrelmail version 1.4.0 or newer with Address Add Plugin version 2.1
or newer
Sending a HTML email containing an IMG tag which provides a SRC attribute
pointing at the vulnerable plugin may allow an attacker to retrieve the
victims' cookie and session information without the victim being aware.
The exploit may be triggered when the victim clicks on a specially crafted
URL contained in the email and hovers the address book form field.
The following partial URL demonstrates the issue:
/squirrelmail_root_dir/plugins/address_add/add.php?
first=HOVER%20ME!%22%20onMouseOver=%22alert('foo');
Move your mouse pointer over the input field which says so.
Other variables on this script can be misused in the same way.
Disclosure Timeline:
Sep 24, 2005: Maintainer informed
Sep 25, 2005: First maintainer reply
Sep 25, 2005: Maintainer provides fix
Sep 29, 2005: Public disclosure
ADDITIONAL INFORMATION
The information has been provided by <mailto:info@moritz-naumann.com>
Moritz Naumann.
The original article can be found at:
<http://moritz-naumann.com/adv/0002/sqmadd/0002.txt>
http://moritz-naumann.com/adv/0002/sqmadd/0002.txt
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