Remote code execution in Microsoft Office

1) Buffer overflow

EUVDB-ID: #VU4342

Risk: Critical

CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2013-1331

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

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

External links

http://technet.microsoft.com/en-us/library/security/ms13-051.aspx

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.