CVE-2021-21778 — HIGH (7.5)

Vulnerability Description

A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mz-Automation	Lib60870	2.2.0

Related Weaknesses (CWE)

CWE-617

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1236ExploitThird Party Advisory

FAQ

What is CVE-2021-21778?

CVE-2021-21778 is a vulnerability with a CVSS score of 7.5 (HIGH). A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. ...

How severe is CVE-2021-21778?

CVE-2021-21778 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-2021-21778?

Check the references section above for vendor advisories and patch information. Affected products include: Mz-Automation Lib60870.