#VU4814 Improper input validation in Microsoft Silverlight - CVE-2016-0034
Published: January 12, 2016 / Updated: November 20, 2020
Vulnerability identifier: #VU4814
Vulnerability risk: Critical
CVSSv4.0: 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-2016-0034
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Microsoft Silverlight
Microsoft Silverlight
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to an error when parsing strings with a malicious decoder that can return negative offsets. A remote attacker can create a specially crafted content, trick the victim into opening it, replace unsafe object headers with contents provided by an attacker 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 an error when parsing strings with a malicious decoder that can return negative offsets. A remote attacker can create a specially crafted content, trick the victim into opening it, replace unsafe object headers with contents provided by an attacker 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.
Remediation
Install update from vendor's website.