#VU54219 Buffer overflow in OPC UA C++ SDK - CVE-2021-32994

Vulnerability identifier: #VU54219

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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-2021-32994

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OPC UA C++ SDK
Server applications / Other server solutions

Vendor: Softing AG

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the exported library functions. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OPC UA C++ SDK: 5.59 - 5.64

---

External links
https://ics-cert.us-cert.gov/advisories/icsa-21-168-02

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.