PT-2023-7448 · Opc Foundation · Opc Foundation Ua .Net Standard

Noam Moshe + 3 · Published 2023-05-03 · Updated 2024-05-08 · CVE-2023-27321

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions OPC Foundation UA .NET Standard (affected versions not specified)

Description This issue allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server, leveraging this to create a denial-of-service condition. Authentication is not required to exploit this issue.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2023-08489

CVE-2023-27321

GHSA-VPF7-R2FV-75M9

ZDI-23-548

Affected Products

Opc Foundation Ua .Net Standard

References · 10

• https://bdu.fstec.ru/vul/2023-08489 · Security Note
• https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-27321.pdf · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-23-548 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-27321 · Security Note
• https://osv.dev/vulnerability/GHSA-vpf7-r2fv-75m9 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-27321 · Vendor Advisory
• https://github.com/OPCFoundation/UA-.NETStandard · Note
• https://github.com/OPCFoundation/UA-.NETStandard/security/advisories/GHSA-vpf7-r2fv-75m9 · Note
• https://github.com/advisories/GHSA-vpf7-r2fv-75m9 · Note
• https://twitter.com/CVEnew/status/1788295926479822907 · Twitter Post