SB2013120910 - Race condition in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2013-7026)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

Multiple race conditions in ipc/shm.c in the Linux kernel before 3.12.2 allow local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via a crafted application that uses shmctl IPC_RMID operations in conjunction with other shm system calls.

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.2
• http://www.ubuntu.com/usn/USN-2070-1
• http://www.ubuntu.com/usn/USN-2075-1
• https://github.com/torvalds/linux/commit/a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1