SB2014070308 - Input validation error in Linux kernel

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2014-4656)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

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.

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=883a1d49f0d77d30012f114b2e19fc141beb3e8e
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ac902c112d90a89e59916f751c2745f4dbdbb4bd
• http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
• http://rhn.redhat.com/errata/RHSA-2014-1083.html
• http://rhn.redhat.com/errata/RHSA-2015-0087.html
• http://secunia.com/advisories/59434
• http://secunia.com/advisories/59777
• http://secunia.com/advisories/60545
• http://secunia.com/advisories/60564
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.2
• http://www.openwall.com/lists/oss-security/2014/06/26/6
• http://www.securitytracker.com/id/1038201
• http://www.ubuntu.com/usn/USN-2334-1
• http://www.ubuntu.com/usn/USN-2335-1
• https://bugzilla.redhat.com/show_bug.cgi?id=1113470
• https://github.com/torvalds/linux/commit/883a1d49f0d77d30012f114b2e19fc141beb3e8e
• https://github.com/torvalds/linux/commit/ac902c112d90a89e59916f751c2745f4dbdbb4bd
• https://source.android.com/security/bulletin/2017-04-01