CVE-2012-2744

Publication date 10 July 2012

Last updated 24 July 2024

Ubuntu priority

net/ipv6/netfilter/nf_conntrack_reasm.c in the Linux kernel before 2.6.34, when the nf_conntrack_ipv6 module is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via certain types of fragmented IPv6 packets.

From the Ubuntu Security Team

An error was found in the Linux kernel’s IPv6 netfilter when connection tracking is enabled. A remote attacker could exploit this flaw to crash a system if it is using IPv6 with the nf_contrack_ipv6 kernel module loaded.

Read the notes from the security team

Status

Show unmaintained releases

No maintained releases are affected by this CVE.

Package	Ubuntu Release	Status
linux	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	11.04 natty	Not affected
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Fixed 2.6.24-32.104
linux-armadaxp	12.04 LTS precise	Not affected
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-ec2	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release
linux-fsl-imx51	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Ignored end of life
	8.04 LTS hardy	Not in release
linux-linaro-omap	12.04 LTS precise	Ignored end of life
	11.10 oneiric	Ignored end of life
	11.04 natty	Ignored end of life
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-linaro-shared	12.04 LTS precise	Ignored end of life
	11.10 oneiric	Ignored end of life
	11.04 natty	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-linaro-vexpress	12.04 LTS precise	Ignored end of life
	11.10 oneiric	Ignored end of life
	11.04 natty	Ignored end of life
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-lts-backport-maverick	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Ignored end of life
	8.04 LTS hardy	Not in release
linux-lts-backport-natty	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release
linux-lts-backport-oneiric	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release
linux-mvl-dove	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Ignored end of life
	8.04 LTS hardy	Not in release
linux-qcm-msm	12.04 LTS precise	Ignored end of life
	11.10 oneiric	Ignored end of life
	11.04 natty	Ignored end of life
	10.04 LTS lucid	Ignored end of life
	8.04 LTS hardy	Not in release
linux-ti-omap4	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	11.04 natty	Not affected
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release

Notes

jdstrand

linux-armadaxp is maintained by OEM commit is from 2010. Ubuntu 10.04 LTS confirmed as not affected downgrading to ‘medium’ (and therefore will follow the standard kernel cadence update process). This is a 2 year old fix that only affects Ubuntu 8.04 LTS when using IPv6.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Vendor: https://rhn.redhat.com/errata/RHSA-2012-1064.html Introduced by 1da177e, fixed by 9e2dcf7

References

Related Ubuntu Security Notices (USN)

USN-1507-1
Linux kernel vulnerabilities
17 July 2012