#VU5561 Security bypass


Published: 2017-01-31 | Updated: 2017-03-10

Vulnerability identifier: #VU5561

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2375

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Excel
Client/Desktop applications / Office applications
Microsoft Office
Client/Desktop applications / Office applications
Microsoft SharePoint Server
Server applications / Application servers

Vendor: Microsoft

Description
The vulnerability allows a remote attacker to bypass Address Space Layout Randomization on the target system.

The weakness exists due to insecure memory release. A remote attacker can create a specially crafted Excel file, trick the victim into opening it and bypass ASLR mechanism.

Successful exploitation of this vulnerability results in security bypass on the vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Excel:

Microsoft SharePoint Server: 2010 - 2013

Microsoft Office: 2007, 2010


External links
http://technet.microsoft.com/en-us/library/security/ms15-070


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?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability