CVE-2006-4572

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-11-07 · updated 2026-06-16
Weakness: CWE-264

Description

ip6_tables in netfilter in the Linux kernel before 2.6.16.31 allows remote attackers to (1) bypass a rule that disallows a protocol, via a packet with the protocol header not located immediately after the fragment header, aka "ip6_tables protocol bypass bug;" and (2) bypass a rule that looks for a certain extension header, via a packet with an extension header outside the first fragment, aka "ip6_tables extension header bypass bug."

Affected products

Linux kernel: through 2.6.16.30; 2.6.0, 2.6.1, 2.6.1-rc1, 2.6.1-rc2, 2.6.1-rc3, 2.6.2 (+147)

References

http://readlist.com/lists/vger.kernel.org/linux-kernel/55/275979.html
http://secunia.com/advisories/22731
http://secunia.com/advisories/22762
http://secunia.com/advisories/23384
http://secunia.com/advisories/23474
http://secunia.com/advisories/24098
http://secunia.com/advisories/25691
http://www.kernel.org/git/?p=linux%2Fkernel%2Fgit%2Fstable%2Flinux-2.6.16.y.git&a=search&s=CVE-2006-4572
http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git%3Ba=commit%3Bh=0ddfcc96928145d6a6425fdd26dad6abfe7f891d
http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git%3Ba=commit%3Bh=6ac62be885810e1f8390f0c3b9d3ee451d3d3f19
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.31
http://www.mandriva.com/security/advisories?name=MDKSA-2006:197

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