24068 : Multiple BSD IPsec Sequence Number fast_ipsec(4) Verification Bypass
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2006-03-22

Description

The IP Security Protocol (IPSec) on FreeBSD contains a flaw that may allow a malicious user to replay IPSec packets. The issue is triggered when IPSec fails to update the replay sequence number associated with a Security Association, allowing packets to unconditionally pass sequence number verification checks. It is possible that the flaw may allow a loss of integrity.

Classification

Location: Remote / Network Access
Impact: Loss of Integrity
Disclosure: OSVDB Verified

Solution

Upgrade to version 4-STABLE, 5-STABLE, or 6-STABLE, or to the RELENG_6_0, RELENG_5_4, RELENG_5_3, RELENG_4_11, or RELENG_4_10 security branch dated after the correction date, as it has been reported to fix this vulnerability. In addition, FreeBSD has released a patch to address this vulnerability.

Products

FreeBSD Project	FreeBSD	4.8-x
		4.9-x
		4.10-x
		4.11-x
		5.0-x
		5.1-x
		5.2-x
		5.3-x
		5.4-x
		6.0-x
		6.1-STABLE

References

Security Tracker: 1015809
Bugtraq ID: 17191
Secunia Advisory ID: 19366
CVE ID: 2006-0905 (see also: NVD)
SCIP VulDB ID: 2107
ISS X-Force ID: 25398
Other Advisory URL: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:11.ipsec.asc http://packetstormsecurity.org/advisories/freebsd/FreeBSD-SA-06-11.ipsec.txt
Vendor Specific Solution URL: ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:11/ipsec.patch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:11/ipsec.patch.asc
Vendor Specific Advisory URL: ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-011.txt.asc
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2006-03/0401.html
Vendor URL: http://www.freebsd.org
Generic Informational URL: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/ipsec.html

Credit

Pawel Jakub Dawidek - pjdfreebsd.org - FreeBSD Project

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2006-03-23 | Disagree?

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