CVE-2014-3145

Published: 11 May 2014

The BPF_S_ANC_NLATTR_NEST extension implementation in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 uses the reverse order in a certain subtraction, which allows local users to cause a denial of service (over-read and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr_nest function before the vulnerability was announced.

From the Ubuntu Security Team

A remainder calculation 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-2014-3145
• 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/1319563