#VU83637 Improper validation of certificate with host mismatch in PTC products - CVE-2023-5909

Vulnerability identifier: #VU83637

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-5909

CWE-ID: CWE-297

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kepware KepServerEX
Server applications / Other server solutions
ThingWorx Kepware Server
Server applications / Other server solutions
ThingWorx Industrial Connectivity
Server applications / Other server solutions
ThingWorx Kepware Edge
Server applications / Other server solutions
OPC Aggregator
Server applications / Other server solutions

Vendor: PTC

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected application does not properly validate certificates from clients. A remote attacker can connect to the application and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Kepware KepServerEX: 6.14.263.0

ThingWorx Kepware Server: 6.14.263.0

ThingWorx Industrial Connectivity: All versions

ThingWorx Kepware Edge: 1.7

OPC Aggregator: 6.14

---

External links
https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03
https://www.ptc.com/en/support/article/CS405439

---

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.