High severity · published Apr 22, 2020
CVE-2020-8867
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
7.5
CVSS
2.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UA
Unified Architecture .net-standard · Opcfoundation
through 1.04.358.30 · source: NVD
Affected product
UA
Unified Architecture .net-standard
Opcfoundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8867
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8867
Vendor Advisory
https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-536/
More from Unified Architecture .net-standard
7.5
CVE-2018-12086
Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests