#VU43080 NULL pointer dereference in Linux kernel - CVE-2013-0313

Vulnerability identifier: #VU43080

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-0313

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via an attempted removexattr operation on an inode of a sockfs filesystem.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 3.0 - 3.0.44, 3.1 - 3.1.10, 3.2 - 3.2.30, 3.3 - 3.3.8, 3.4 - 3.4.24, 3.5.1 - 3.5.7, 3.6.9 - 3.6.11, 3.7 - 3.7.3

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External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a67adb997419fb53540d4a4f79c6471c60bc69b6
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.5
https://www.openwall.com/lists/oss-security/2013/02/20/16
https://bugzilla.redhat.com/show_bug.cgi?id=913266
https://github.com/torvalds/linux/commit/a67adb997419fb53540d4a4f79c6471c60bc69b6

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.