Secunia Security Advisory - A security issue has been reported in NetBSD, which can potentially be exploited by malicious people to bypass certain security restrictions.
ad11633ed4b05ffd2009727461336e52995daea342b8d2879510edd49bd3329d
----------------------------------------------------------------------
A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI
has been released. The new version includes many new and advanced
features, which makes it even easier to stay patched.
Download and test it today:
https://psi.secunia.com/
Read more about this new version:
https://psi.secunia.com/?page=changelog
----------------------------------------------------------------------
TITLE:
NetBSD FAST_IPSEC "ipsec4_get_ulp()" Security Bypass
SECUNIA ADVISORY ID:
SA29180
VERIFY ADVISORY:
http://secunia.com/advisories/29180/
CRITICAL:
Moderately critical
IMPACT:
Security Bypass
WHERE:
>From remote
OPERATING SYSTEM:
NetBSD 3.1
http://secunia.com/product/16089/
DESCRIPTION:
A security issue has been reported in NetBSD, which can potentially
be exploited by malicious people to bypass certain security
restrictions.
The security issue is caused due to the "ipsec4_get_ulp()" function
assuming that the "ip_off" field of an IPSec packet is in host endian
form. This can be exploited to bypass IPsec policies if at least one
of two IPsec connected systems with different byte orders is running
a NetBSD operating system.
Successful exploitation requires that the kernel is compiled with the
"FAST_IPSEC" option.
SOLUTION:
Patches have been committed to CVS for the affected NetBSD branches
(see vendor advisory for further details).
PROVIDED AND/OR DISCOVERED BY:
The vendor credits Karl Knutsson.
ORIGINAL ADVISORY:
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2008-002.txt.asc
----------------------------------------------------------------------
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.
----------------------------------------------------------------------