SB2011011303 - Buffer overflow in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2010-4527)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The load_mixer_volumes function in sound/oss/soundcard.c in the OSS sound subsystem in the Linux kernel before 2.6.37 incorrectly expects that a certain name field ends with a '' character, which allows local users to conduct buffer overflow attacks and gain privileges, or possibly obtain sensitive information from kernel memory, via a SOUND_MIXER_SETLEVELS ioctl call.

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d81a12bc29ae4038770e05dce4ab7f26fd5880fb
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
• http://openwall.com/lists/oss-security/2010/12/31/1
• http://openwall.com/lists/oss-security/2010/12/31/4
• http://secunia.com/advisories/42765
• http://secunia.com/advisories/43291
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37
• http://www.securityfocus.com/bid/45629
• http://www.vupen.com/english/advisories/2011/0375
• http://xorl.wordpress.com/2011/01/09/cve-2010-4527-linux-kernel-oss-sound-card-driver-buffer-overflow/
• https://bugzilla.redhat.com/show_bug.cgi?id=667615