#VU4342 Buffer overflow in Microsoft Office for Mac and Microsoft Office - CVE-2013-1331

Vulnerability identifier: #VU4342

Vulnerability risk: Critical

CVSSv4.0: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2013-1331

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office for Mac
Client/Desktop applications / Office applications
Microsoft Office
Client/Desktop applications / Office applications

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to buffer overflow when processing malicious PNG files. A remote attacker can create specially crafted file, trick the victim into opening it using an affected version of Microsoft Office, trigger memory corruption and execute arbitrary code with privileges of the current user.

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:

Microsoft Office 2003 Service Pack 3:
https://www.microsoft.com/downloads/details.aspx?familyid=1acd93fa-e6d6-44b1-86de-4fbb464d0e6c
Microsoft Office for Mac 2011:
https://www.microsoft.com/downloads/details.aspx?familyid=8bb70e5c-a3b1-4618-8295-2721b78f1d5f

Vulnerable software versions

Microsoft Office for Mac: 2011

Microsoft Office: 2003

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External links
https://technet.microsoft.com/en-us/library/security/ms13-051.aspx

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.