----------------------------------------------------------------------

Want to work within IT-Security?

Secunia is expanding its team of highly skilled security experts.
We will help with relocation and obtaining a work permit.

Currently the following type of positions are available:
http://secunia.com/quality_assurance_analyst/
http://secunia.com/web_application_security_specialist/ 
http://secunia.com/hardcore_disassembler_and_reverse_engineer/

----------------------------------------------------------------------

TITLE:
OpenBSD isakmpd IPSec Sequence Number Verification Bypass

SECUNIA ADVISORY ID:
SA21652

VERIFY ADVISORY:
http://secunia.com/advisories/21652/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

OPERATING SYSTEM:
OpenBSD 3.x
http://secunia.com/product/100/

DESCRIPTION:
A security issue has been reported in OpenBSD, which can be exploited
by malicious people to bypass certain security restrictions.

The security issue is caused due to isakmpd creating a replay window
of size 0 when responding to SA negotiations, which can be exploited
by an attacker to capture IPSec packets and subsequently replay them.

SOLUTION:
Apply patches.

OpenBSD 3.9:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/008_isakmpd.patch

OpenBSD 3.8:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.8/common/013_isakmpd.patch

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.openbsd.org/errata.html

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------