CVE-2021-27434 — HIGH (7.5)

Q: How severe is CVE-2021-27434?

CVE-2021-27434 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-27434?

Check the references section above for vendor advisories and patch information. Affected products include: Unified-Automation .Net Based Opc Ua Client\/Server Sdk, Microsoft .Net Framework.

Vulnerability Description

Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Unified-Automation	.Net Based Opc Ua Client\/Server Sdk	<= 3.0.7
Microsoft	.Net Framework	3.5

Related Weaknesses (CWE)

CWE-674 CWE-200

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04Third Party AdvisoryUS Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04Third Party AdvisoryUS Government Resource

FAQ

What is CVE-2021-27434?

CVE-2021-27434 is a vulnerability with a CVSS score of 7.5 (HIGH). Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, whi...

How severe is CVE-2021-27434?

CVE-2021-27434 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-27434?

Check the references section above for vendor advisories and patch information. Affected products include: Unified-Automation .Net Based Opc Ua Client\/Server Sdk, Microsoft .Net Framework.