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TITLE:
tcpdump print-bgp.c Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA26135

VERIFY ADVISORY:
http://secunia.com/advisories/26135/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
tcpdump 3.x
http://secunia.com/product/749/

DESCRIPTION:
mu-b has reported a vulnerability in tcpdump, which potentially can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to the incorrect use of the return
value of "snprintf()" in print-bgp.c. This can be exploited to cause
a buffer overflow by sending specially crafted BGP packets.

Successful exploitation may allow the execution of arbitrary code.

The vulnerability is reported in version 3.9.6. Other versions may
also be affected.

SOLUTION:
Fixed in the SVN repository.
http://cvs.tcpdump.org/cgi-bin/cvsweb/tcpdump/print-bgp.c?r1=1.91.2.11&r2=1.91.2.12

PROVIDED AND/OR DISCOVERED BY:
mu-b, digit-labs.org

ORIGINAL ADVISORY:
http://www.digit-labs.org/files/exploits/private/tcpdump-bgp.c

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