1) Privilege escalation

Risk: Medium

CVSSv3.1: 8.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2014-4113

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: Yes

Description

The vulnerability allows a local attacker to obtain elevated privileges on the target system.

The weakness exists due to improper handling of objects in memory by kernel-mode driver (win32k.sys). A local attacker can run a specially crafted application to gain elevated privileges and take complete control of the system.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows Server: 2003, 2008, 2008 R2, 2012, 2012 R2

Windows: 7, 8, 8.1, RT, RT 8.1, Vista

CPE

• cpe:2.3:o:microsoft:windows_server:2003:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows_server:2008 R2:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows_server:2008:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows_server:2012 R2:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows_server:2012:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:RT 8.1:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:RT:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:8:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:7:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:Vista:*:*:*:*::*:*
• cpe:2.3:o:microsoft:windows:8.1:*:*:*:*::*:*

External links

https://technet.microsoft.com/en-us/library/security/ms14-058

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. However, a fully functional exploit for this vulnerability is available.