Resource exhaustion in Prosys OPC products - CVE-2023-32787
Published: June 1, 2023
Vulnerability identifier: #VU76736
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-32787
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
UA Simulation Server
UA SDK for Java
UA Historian
UA Modbus Server
UA Simulation Server
UA SDK for Java
UA Historian
UA Modbus Server
Software vendor:
Prosys OPC
Prosys OPC
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within the handling of OpenSecureChannel messages. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.
External links
- https://github.com/OPCFoundation/UA-Java-Legacy/commit/6f176f2b445a27c157f1a32f225accc9ce8873c0
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-32787.pdf
- https://github.com/OPCFoundation/UA-Java-Legacy
- https://www.zerodayinitiative.com/advisories/ZDI-23-778/
- https://www.prosysopc.com/blog/pwn2own-2023-resource-exhaustion-exploit/