Deserialization of Untrusted Data in CODESYS Development System - CVE-2021-21865
Published: July 27, 2021
Vulnerability identifier: #VU55323
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21865
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in the PackageManagement.plugin ExtensionMethods.Clone() functionality. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
CODESYS Development System
How to mitigate CVE-2021-21865
Install updates from vendor's website.
CODESYS Development System - update to 3.5.17.10