#VU44071 Integer overflow in Linux kernel - CVE-2012-0044

Vulnerability identifier: #VU44071

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-0044

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

Integer overflow in the drm_mode_dirtyfb_ioctl function in drivers/gpu/drm/drm_crtc.c in the Direct Rendering Manager (DRM) subsystem in the Linux kernel before 3.1.5 allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted ioctl call.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.1.1 - 3.1.4

---

External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a5cd335165e31db9dbab636fd29895d41da55dd2
https://rhn.redhat.com/errata/RHSA-2012-0743.html
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.5
https://www.openwall.com/lists/oss-security/2012/01/12/1
https://www.securityfocus.com/bid/51371
https://www.ubuntu.com/usn/USN-1555-1
https://www.ubuntu.com/usn/USN-1556-1
https://bugzilla.redhat.com/show_bug.cgi?id=772894
https://github.com/torvalds/linux/commit/a5cd335165e31db9dbab636fd29895d41da55dd2

---

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.