#VU43439 Input validation error in Linux kernel - CVE-2012-3511

Vulnerability identifier: #VU43439

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-2012-3511

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows local users to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (use-after-free and system crash) via vectors involving a (1) munmap or (2) close system call.

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

Vulnerable software versions

Linux kernel: 3.0 - 3.0.34, 3.1 - 3.1.10, 3.2 - 3.2.20, 3.3 - 3.3.8, 3.4 - 3.4.3

---

External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9ab4233dd08036fe34a89c7dc6f47a8bf2eb29eb
https://secunia.com/advisories/50633
https://secunia.com/advisories/50732
https://secunia.com/advisories/55055
https://ubuntu.com/usn/usn-1529-1
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5
https://www.openwall.com/lists/oss-security/2012/08/20/13
https://www.securityfocus.com/bid/55151
https://www.ubuntu.com/usn/USN-1567-1
https://www.ubuntu.com/usn/USN-1572-1
https://www.ubuntu.com/usn/USN-1577-1
https://bugzilla.redhat.com/show_bug.cgi?id=849734
https://github.com/torvalds/linux/commit/9ab4233dd08036fe34a89c7dc6f47a8bf2eb29eb

---

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.