TITLE:
KisMAC Cisco Vendor Tag SSID Parsing Buffer Overflow

SECUNIA ADVISORY ID:
SA19354

VERIFY ADVISORY:
http://secunia.com/advisories/19354/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
KisMAC 0.x
http://secunia.com/product/2073/

DESCRIPTION:
Stefan Esser has reported a vulnerability in KisMAC, which
potentially can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error in the
"WavePacket:parseTaggedData()" function when parsing the Cisco vendor
tag for additional SSIDs in a received 802.11 management frame. This
can be exploited to cause a stack-based buffer overflow and
potentially allows arbitrary code execution.

Successful exploitation requires that the user is e.g. tricked into
opening a malicious pcap file containing special-crafted management
frames, or via raw management frames that are sent onto the wireless
network while the user is performing a passive network scan.

The vulnerability has been reported in versions prior to R73p and is
reportedly introduced in version R54.

SOLUTION:
Update to version R73p.
http://kismac.de/download.php

The vulnerability has also been fixed in developer version 113.

PROVIDED AND/OR DISCOVERED BY:
Stefan Esser, Hardened-PHP Project.

ORIGINAL ADVISORY:
KisMAC:
http://kismac.de/_trac/changeset/113

Hardened-PHP Project:
http://www.hardened-php.net/advisory_032006.115.html

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