20727 : NetBSD IPsec-AH AES-XCBC-MAC Fixed Key Calculation Weakness
Printer | http://osvdb.org/20727 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
2	377	over 6 years ago	over 3 years ago	0 times	85%

Timeline

Disclosure Date
2005-10-31

Keywords

NetBSD Security Advisory 2005-007

Description

NetBSD contains a flaw that may allow a malicious attacker to bypass IP Security (IPsec). The issue is triggered when a machine using IPsec with AH and the AES-XCBC-MAC algorithm incorrectly uses a fixed key instead of the provided one. It is possible that the flaw may allow the acceptance of forged packets, resulting in a loss of integrity.

Classification

Location: Remote / Network Access
Attack Type: Authentication Management
Impact: Loss of Integrity
Disclosure: OSVDB Verified

Solution

Upgrade to version 2.0.3 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

NetBSD Foundation, Inc.	NetBSD	1.6.x
		2.0
		2.0.1
		2.0.2
		2.0.3
		2.1

References

Security Tracker: 1015132
Related OSVDB ID: 20725 20726 20728 20729 20730 20731
Vendor Specific Advisory URL: ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2005-007.txt.asc http://mail-index.netbsd.org/netbsd-announce/2005/10/31/0000.html
Vendor URL: http://www.netbsd.org/
Other Advisory URL: http://www.uniras.gov.uk/niscc/docs/br-20051101-00969.html?lang=en
Keyword: NetBSD Security Advisory 2005-007

Credit

Yukiyo Akisada - Yokogawa Electric Corporation
Suzuki Shinsuike -

CVSSv2 Score

We currently have no CVSS2 data on this vulnerability. Feel free to suggest it.

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

None found at this time

Comments

Add Comment Hide Add Comment

No Comments.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.