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CVE-2021-20231

CRITICALCVSS 9.8/10EPSS 3.75%

Last modified

CVE-2021-20231 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.. EPSS estimates a 3.75% chance of exploitation in the next 30 days.

Description

A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
3.75%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GnuGnutls>= 3.6.3, < 3.7.1
RedhatEnterprise Linux8.0
FedoraprojectFedora34
NetappActive Iq Unified ManagerAll versions
NetappE-Series Performance AnalyzerAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-20231?
A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.
How severe is CVE-2021-20231?
CVE-2021-20231 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.75% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20231?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20231?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST