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TITLE:
OpenH323 opal Session Initiation Protocol Vulnerability

SECUNIA ADVISORY ID:
SA27129

VERIFY ADVISORY:
http://secunia.com/advisories/27129/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
OpenH323 opal 2.x
http://secunia.com/product/15968/

DESCRIPTION:
A vulnerability has been reported in OpenH323 opal, which can
potentially be exploited by malicious people to compromise an
application using the library.

The vulnerability is caused due to an error in the processing of SIP
(Session Initiation Protocol) packets within the "SIP_PDU::Read()"
method in sip/sippdu.cxx. This can be exploited to write a zero byte
to an arbitrary memory address.

The vulnerability is reported in version 2.2.4. Prior versions may
also be affected.

SOLUTION:
Fixed in the CVS repository.
http://openh323.cvs.sourceforge.net/openh323/opal/src/sip/sippdu.cxx?r1=2.83.2.19&r2=2.83.2.20

PROVIDED AND/OR DISCOVERED BY:
The vendor credits José Miguel Esparza.

ORIGINAL ADVISORY:
Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=296371

Ekiga:
http://mail.gnome.org/archives/ekiga-list/2007-September/msg00103.html

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