Out-of-bounds write in CODESYS V2 web server - CVE-2021-30193
Published: June 23, 2021
Vulnerability identifier: #VU54328
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-2021-30193
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can use a specially crafted web server request, trigger out-of-bounds write and execute arbitrary code on the target system.
Affected software
CODESYS V2 web server
How to mitigate CVE-2021-30193
Install updates from vendor's website.
CODESYS V2 web server - update to 1.1.9.20