Remote code execution in Express Compressed Fonts in Microsoft Windows

Published: 2017-08-08 22:27:39 | Updated: 2017-08-16 10:48:32
Severity High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2017-8691
CVSSv3 8.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CWE ID CWE-20
Exploitation vector Network
Public exploit Not available
Vulnerable software Windows Server
Windows
Vulnerable software versions Windows Server 2008
Windows Server 2008 R2
Windows 7
Vendor URL Microsoft

Security Advisory

1) Improper input validation

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an error when processing embedded fonts in Windows font library. A remote attacker can create a specially crafted font file, trick the victim into loading via a web-page or a document file, and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8691

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