SB2014040115 - Input validation error in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2014-2673)

CWE-ID: CWE-20 - Improper input validation

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.

The arch_dup_task_struct function in the Transactional Memory (TM) implementation in arch/powerpc/kernel/process.c in the Linux kernel before 3.13.7 on the powerpc platform does not properly interact with the clone and fork system calls, which allows local users to cause a denial of service (Program Check and system crash) via certain instructions that are executed with the processor in the Transactional state.

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=621b5060e823301d0cba4cb52a7ee3491922d291
• http://secunia.com/advisories/57436
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.7
• http://www.openwall.com/lists/oss-security/2014/03/30/5
• http://www.securityfocus.com/bid/66477
• https://exchange.xforce.ibmcloud.com/vulnerabilities/92113
• https://github.com/torvalds/linux/commit/621b5060e823301d0cba4cb52a7ee3491922d291
• https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.15