CVE-2014-4656

Published: 3 July 2014

Multiple integer overflows in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 allow local users to cause a denial of service by leveraging /dev/snd/controlCX access, related to (1) index values in the snd_ctl_add function and (2) numid values in the snd_ctl_remove_numid_conflict function.

From the Ubuntu Security Team

An integer overflow flaw was discovered in the control implementation of the Advanced Linux Sound Architecture (ALSA). A local user could exploit this flaw to cause a denial of service (system crash).

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
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4656
• https://github.com/torvalds/linux/commit/ac902c112d90a89e59916f751c2745f4dbdbb4bd
• https://github.com/torvalds/linux/commit/883a1d49f0d77d30012f114b2e19fc141beb3e8e
• https://bugzilla.redhat.com/show_bug.cgi?id=1113470
• http://www.openwall.com/lists/oss-security/2014/06/26/6
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.2
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ac902c112d90a89e59916f751c2745f4dbdbb4bd
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=883a1d49f0d77d30012f114b2e19fc141beb3e8e
• https://ubuntu.com/security/notices/USN-2332-1
• https://ubuntu.com/security/notices/USN-2333-1
• https://ubuntu.com/security/notices/USN-2334-1
• https://ubuntu.com/security/notices/USN-2335-1
• https://ubuntu.com/security/notices/USN-2336-1
• https://ubuntu.com/security/notices/USN-2337-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1339306