CVE-2023-3825 Denial of service in KEPServerEX
Attackers can crash KEPServerEX by sending malicious OPC UA messages causing stack overflow, impacting industrial connectivity availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-3825?
CVE-2023-3825 is a high-severity denial of service vulnerability in PTC KEPServerEX, published on 31 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.
Which versions are affected by CVE-2023-3825?
It affects 1 product.
Products include Kepware Kepserverex.
How do I fix CVE-2023-3825?
No fix has been published for CVE-2023-3825 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-3825 being exploited?
There is no known exploitation of CVE-2023-3825 in the wild and no public exploit code.
Other vulnerabilities in PTC KEPServerEX
Sources
Also known as GHSA-m3jq-gg7x-47cq.