#VU92873 Security restrictions bypass in Linux kernel - CVE-2006-4572

Vulnerability identifier: #VU92873

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2006-4572

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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.'

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://readlist.com/lists/vger.kernel.org/linux-kernel/55/275979.html
https://secunia.com/advisories/22731
https://secunia.com/advisories/22762
https://www.securityfocus.com/bid/20955
https://www.kernel.org/git/?p=linux%2Fkernel%2Fgit%2Fstable%2Flinux-2.6.16.y.git&a=search&s=CVE-2006-4572
https://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.31
https://www.ubuntu.com/usn/usn-395-1
https://secunia.com/advisories/23384
https://www.novell.com/linux/security/advisories/2006_79_kernel.html
https://www.ubuntu.com/usn/usn-416-1
https://secunia.com/advisories/24098
https://www.securityfocus.com/archive/1/471457
https://www.mandriva.com/security/advisories?name=MDKSA-2006:197
https://secunia.com/advisories/25691
https://secunia.com/advisories/23474
https://www.vupen.com/english/advisories/2006/4386
https://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git%3Ba=commit%3Bh=0ddfcc96928145d6a6425fdd26dad6abfe7f891d
https://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git%3Ba=commit%3Bh=6ac62be885810e1f8390f0c3b9d3ee451d3d3f19

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.