Vulnerability identifier: #VU95769

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2005-0449

CWE-ID: CWE-20

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 perform a denial of service (DoS) attack.

The netfilter/iptables module in Linux before 2.6.8.1 allows remote attackers to cause a denial of service (kernel crash) or bypass firewall rules via crafted packets, which are not properly handled by the skb_checksum_help function.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel:

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External links
http:ftp://patches.sgi.com/support/free/security/advisories/20060402-01-U
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000945
http://oss.sgi.com/archives/netdev/2005-01/msg01036.html
http://secunia.com/advisories/19369
http://secunia.com/advisories/19374
http://secunia.com/advisories/19607
http://www.debian.org/security/2006/dsa-1017
http://www.debian.org/security/2006/dsa-1018
http://www.mandriva.com/security/advisories?name=MDKSA-2005:218
http://www.novell.com/linux/security/advisories/2005_18_kernel.html
http://www.redhat.com/support/errata/RHSA-2005-283.html
http://www.redhat.com/support/errata/RHSA-2005-284.html
http://www.redhat.com/support/errata/RHSA-2005-293.html
http://www.redhat.com/support/errata/RHSA-2005-366.html
http://www.securityfocus.com/bid/12598
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=152532
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10753
http://usn.ubuntu.com/82-1/

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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.