CVE-2020-8867

moderate-risk
Published 2020-04-22

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.

Do I need to act?

~
1.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Opcfoundation

References (4)

Vendor Advisory https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bullet...
Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-536/
Vendor Advisory https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bullet...
Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-536/
35
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 4/34 · Minimal
Exposure 5/34 · Minimal