Stack-based buffer overflow in CODESYS V2 web server - CVE-2021-30189
Published: June 23, 2021
Vulnerability identifier: #VU54324
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30189
CWE-ID: CWE-121
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 a boundary error. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
CODESYS V2 web server
How to mitigate CVE-2021-30189
Install updates from vendor's website.
CODESYS V2 web server - update to 1.1.9.20