ASLR bypass in Microsoft Office

1) ASLR bypass

EUVDB-ID: #VU4346

Risk: High

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2013-5057

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The weakness exists due to improper implementation of Address Space Layout Randomization (ASLR) within HXDS Office shared component. A remote attacker can create a specially crafted Web site, trick the victim into visiting it and bypass the ASLR security feature.

Successful exploitation of the vulnerability may result in attacker's access to the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Office: 2007 - 2010

External links

http://technet.microsoft.com/en-us/library/security/ms13-106.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?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.