CVE-2014-3144

Published: 11 May 2014

The (1) BPF_S_ANC_NLATTR and (2) BPF_S_ANC_NLATTR_NEST extension implementations in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 do not check whether a certain length value is sufficiently large, which allows local users to cause a denial of service (integer underflow and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr and __skb_get_nlattr_nest functions before the vulnerability was announced.

From the Ubuntu Security Team

A bounds check error was discovered in the socket filter subsystem of the Linux kernel. A local user could exploit this flaw to cause a denial of service (system crash) via crafted BPF instructions.

Notes

android kernels (goldfish, grouper, maguro, mako and manta) are not
supported on the Ubuntu Touch 13.10 preview kernels
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3144
• https://git.kernel.org/linus/d214c7537bbf2f247991fb65b3420b0b3d712c67
• https://github.com/torvalds/linux/commit/05ab8f2647e4221cbdb3856dd7d32bd5407316b3
• http://www.openwall.com/lists/oss-security/2014/05/09/6
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=05ab8f2647e4221cbdb3856dd7d32bd5407316b3
• https://ubuntu.com/security/notices/USN-2252-1
• https://ubuntu.com/security/notices/USN-2251-1
• https://ubuntu.com/security/notices/USN-2259-1
• https://ubuntu.com/security/notices/USN-2261-1
• https://ubuntu.com/security/notices/USN-2262-1
• https://ubuntu.com/security/notices/USN-2263-1
• https://ubuntu.com/security/notices/USN-2264-1
• https://ubuntu.com/security/notices/USN-2286-1
• https://ubuntu.com/security/notices/USN-2288-1
• https://ubuntu.com/security/notices/USN-2290-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1319561