CVE-2021-45117
MEDIUMCVSS 6.5/10EPSS 1.40%
Last modified
CVE-2021-45117 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Opcfoundation | Ua-Nodeset | < 1.05.01 |
| Siemens | Simatic Net Pc | 14 |
| Siemens | Simatic Net Pc | 15 |
| Siemens | Simatic Net Pc | 16 |
| Siemens | Simatic Net Pc | 17 |
| Siemens | Sitop Manager | All versions |
| Siemens | Telecontrol Server Basic | 3.0 |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdfPatch, Third Party Advisory
- https://www.youtube.com/watch?v=qv-RBdCaV4kExploit, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdfPatch, Third Party Advisory
- https://www.youtube.com/watch?v=qv-RBdCaV4kExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-45117?
The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.
How severe is CVE-2021-45117?
CVE-2021-45117 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.
How do I fix CVE-2021-45117?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-45117?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST