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FreeBSD IPsec Sequence Number Verification Bypass
Secunia Advisory: SA19366
Release Date: 2006-03-23
Popularity: 8,768 views

Critical:
Moderately critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Patch

OS:FreeBSD 4.x
FreeBSD 5.x
FreeBSD 6.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

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

The security issue is caused due to the incorrect update of the sequence number associated with a Security Association in the "fast_ipsec" implementation. This allows certain packets to unconditionally bypass sequence number verification checks.

Successful exploitation allows an attacker to capture IPSec packets and subsequently replay them.

The security issue has been reported in all FreeBSD versions since 4.8-RELEASE.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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