PT-2021-6748 · Unified Automation · Unified Automation .Net Based Opc Ua Client/Server Sdk Bundle

Eran Jacob · Published 2021-02-19 · Updated 2023-10-15 · CVE-2021-27434

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Unified Automation .NET based OPC UA Client/Server SDK Bundle versions V3.0.7 and prior

Description The issue is related to an uncontrolled recursion that may allow an attacker to trigger a stack overflow. It is also associated with information disclosure, which could enable a remote attacker to disclose protected information.

Recommendations For versions V3.0.7 and prior, update to a version later than V3.0.7 to resolve the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Information Disclosure

Uncontrolled Recursion

Weakness Enumeration

CWE-200

CWE-674

Related Identifiers

BDU:2022-02137

CVE-2021-27434

Affected Products

Unified Automation .Net Based Opc Ua Client/Server Sdk Bundle

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-27434 · Security Note
• https://bdu.fstec.ru/vul/2022-02137 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27434 · Vendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04 · Note
• https://vuldb.com/ru/?id.175441 · Note
• https://cybersecurity-help.cz/vdb/SB2021051404 · Note
• https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-002.pdf · Note
• https://cisa.gov/uscert/ics/advisories/icsa-21-133-04 · Note