Improper input validation in Windows Server and Windows - CVE-2014-4148
Published: January 18, 2017 / Updated: May 25, 2022
Vulnerability identifier: #VU4867
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2014-4148
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Windows Server
Windows
Windows Server
Windows
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to improper input validation when processing TrueType fonts in kernel-mode driver (win32k.sys). A remote attacker can create a specially crafted font file, place it on a web page, trick the victim into visiting it, 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.
The weakness exists due to improper input validation when processing TrueType fonts in kernel-mode driver (win32k.sys). A remote attacker can create a specially crafted font file, place it on a web page, trick the victim into visiting it, 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.
How to mitigate CVE-2014-4148
Install update from vendor's website.