freebsd security - Feb 2008 - What about FreeBSD? - KAME Project "ipcomp6_input()" Denial of Service

TITLE:
KAME Project "ipcomp6_input()" Denial of Service

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote
DESCRIPTION:
A vulnerability has been reported in the KAME Project, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the
"ipcomp6_input()" function in kame/sys/netinet6/ipcomp_input.c when
processing IPv6 packets with an IPComp header. This can be exploited
to crash a vulnerable system by sending a specially crafted IPv6
packet.

SOLUTION:
Fixed in the CVS repository.
http://www.kame.net/dev/cvsweb2.cgi/kame/kame/sys/netinet6/ipcomp_input.c.diff?r1=1.36;r2=1.37

PROVIDED AND/OR DISCOVERED BY:
US-CERT credits Shoichi Sakane.
NetBSD credits the Coverity Prevent analysis tool.

ORIGINAL ADVISORY:
US-CERT VU#110947:
http://www.kb.cert.org/vuls/id/110947

Mohacsi Janos <mohacsi@niif.hu> writes:
> ORIGINAL ADVISORY:
> US-CERT VU#110947:
> http://www.kb.cert.org/vuls/id/110947
As far as I can tell, FreeBSD's ipcomp implementation is not from KAME,
but from OpenBSD, with significant local changes.

DES
-- 
Dag-Erling Sm?rgrav - des@des.no

We are aware and working on resolving this.

Thanks
Remko
Hat: freebsd secteam

-----Original Message-----
From: "Mohacsi Janos" <mohacsi@niif.hu>
To: freebsd-security@freebsd.org
Sent: 6-2-08 21:54
Subject: What about FreeBSD? - KAME Project "ipcomp6_input()" Denial
of Service


TITLE:
KAME Project "ipcomp6_input()" Denial of Service

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote
DESCRIPTION:
A vulnerability has been reported in the KAME Project, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the
"ipcomp6_input()" function in kame/sys/netinet6/ipcomp_input.c when
processing IPv6 packets with an IPComp header. This can be exploited
to crash a vulnerable system by sending a specially crafted IPv6
packet.

SOLUTION:
Fixed in the CVS repository.
http://www.kame.net/dev/cvsweb2.cgi/kame/kame/sys/netinet6/ipcomp_input.c.diff?r1=1.36;r2=1.37

PROVIDED AND/OR DISCOVERED BY:
US-CERT credits Shoichi Sakane.
NetBSD credits the Coverity Prevent analysis tool.

ORIGINAL ADVISORY:
US-CERT VU#110947:
http://www.kb.cert.org/vuls/id/110947

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