CVE-2022-21159 Denial of service in libiec61850

What is CVE-2022-21159?

CVE-2022-21159 is a high-severity denial of service vulnerability in MZ Automation GmbH libiec61850, published on 15 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A denial of service vulnerability exists in the parseNormalModeParameters functionality of MZ Automation GmbH libiec61850 1.5.0. A specially-crafted series of network requests can lead to denial of service. An attacker can send a sequence of malformed iec61850 messages to trigger this vulnerability.

Weakness: CWE-835

Which versions are affected by CVE-2022-21159?

It affects 1 product.

Products include Mz-Automation Libiec61850.

How do I fix CVE-2022-21159?

No fix has been published for CVE-2022-21159 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-21159 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-21159 exists.

Other vulnerabilities in MZ Automation GmbH libiec61850

• CVE-2022-2970 MZ Automation libIEC61850 Stack-Based Buffer Overflow Critical 10.0
• CVE-2022-2972 MZ Automation libIEC61850 Stack-Based Buffer Overflow Critical 10.0
• CVE-2024-45970 Memory corruption in n/a Critical 9.8
• CVE-2024-45971 Memory corruption in n/a Critical 9.8
• CVE-2018-19185 Memory corruption in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wc26-f4h3-2vxx.