Information disclosure in Microsoft Office

1) Out-of-bounds read

EUVDB-ID: #VU14398

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8378

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to out-of-bounds read error when processing Microsoft Office documents. A remote unauthenticated attacker can create a specially crafted Office document, trick the victim into opening it, trigger out-of-bounds read and gain access to contents of memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2010 Service Pack 2 - 2016

Microsoft Word: Viewer

Microsoft SharePoint Server: 2013 - 2016

Word Automation Services on Microsoft SharePoint Server: 2010 Service Pack 2

Microsoft Office Web Apps: 2010 Service Pack 2 - 2013 Service Pack 1

Microsoft Excel: Viewer 2007 Service Pack 3

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8378

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.