CVE-2021-45117 Null dereference in n/a
Attackers can cause a denial of service via NULL pointer dereference in OPC autogenerated ANSI C stack stubs due to unhandled error cases.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-45117?
CVE-2021-45117 is a medium-severity vulnerability in Siemens Telecontrol Server Basic, published on 21 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.
Weakness: CWE-476
Which versions are affected by CVE-2021-45117?
It affects 4 products.
Products include Opcfoundation Ua-Nodeset, Siemens Simatic Net Pc, Siemens Sitop Manager, Siemens Telecontrol Server Basic.
How do I fix CVE-2021-45117?
No fix has been published for CVE-2021-45117 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-45117 being exploited?
There is no known exploitation of CVE-2021-45117 in the wild and no public exploit code.
Sources
Also known as GHSA-v4v7-f2qj-8939.