#VU44357 NULL pointer dereference in Linux kernel - CVE-2011-2203

Vulnerability identifier: #VU44357

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-2203

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 in the Linux kernel 2.6 allows local users to cause a denial of service (NULL pointer dereference and Oops) by mounting an HFS file system with a malformed MDB extent record. A remote attacker can perform a denial of service (DoS) attack.

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

Vulnerable software versions

Linux kernel: 2.6

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External links
https://secunia.com/advisories/47754
https://www.openwall.com/lists/oss-security/2011/06/13/16
https://www.securityfocus.com/bid/48236
https://www.ubuntu.com/usn/USN-1324-1
https://www.ubuntu.com/usn/USN-1328-1
https://www.ubuntu.com/usn/USN-1344-1
https://bugzilla.redhat.com/show_bug.cgi?id=712774
https://lkml.org/lkml/2011/6/8/154

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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.