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TITLE:
Trillian "aim://" URI Handler Two Vulnerabilities

SECUNIA ADVISORY ID:
SA26086

VERIFY ADVISORY:
http://secunia.com/advisories/26086/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Trillian Basic 3.x
http://secunia.com/product/4759/
Trillian Pro 3.x
http://secunia.com/product/5467/

DESCRIPTION:
Two vulnerabilities have been discovered in Trillian, which can be
exploited by malicious people to compromise a user's system.

1) The aim:// URI handler does not verify certain parts of the
"aim://" URI before writing it into a file specified via the
unverified "ini=" parameter. This can be exploited to e.g. write a
batch file into the Windows "Startup" folder that starts an
attacker-defined application by tricking a user into following a
specially crafted "aim://" URI.

2) A boundary error within the processing of "aim://" URIs exists in
the aim.dll plugin. This can be exploited to cause a buffer overflow
by e.g. tricking a user into following a specially crafted "aim://"
URI.

Successful exploitation allows the execution of arbitrary code.

The vulnerabilities are confirmed in Trillian Basic 3.1.6.0. Other
versions may also be affected.

SOLUTION:
Do not browse untrusted sites.

Disable the "aim://" URI handler.

PROVIDED AND/OR DISCOVERED BY:
Nate Mcfeters, Billy (BK) Rios, and Raghav "the Pope" Dube

ORIGINAL ADVISORY:
http://www.xs-sniper.com/nmcfeters/Cross-App-Scripting-2.html

OTHER REFERENCES:
US-CERT VU#786920:
http://www.kb.cert.org/vuls/id/786920

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