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CVE-2021-34558

MEDIUMCVSS 6.5/10EPSS 7.03%

Last modified

CVE-2021-34558 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The crypto/tls package of Go through 1.16.5 does not properly assert that the type of public key in an X.509 certificate matches the expected type when doing a RSA based key exchange, allowing a malicious TLS server to cause a TLS client to panic.. EPSS estimates a 7.03% chance of exploitation in the next 30 days.

Description

The crypto/tls package of Go through 1.16.5 does not properly assert that the type of public key in an X.509 certificate matches the expected type when doing a RSA based key exchange, allowing a malicious TLS server to cause a TLS client to panic.

Metrics

CVSS 3.1
6.5/10

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

EPSS Probability
7.03%

93.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GolangGo< 1.15.14
GolangGo>= 1.16.0, < 1.16.6
FedoraprojectFedora33
FedoraprojectFedora34
NetappCloud Insights TelegrafAll versions
NetappStoragegridAll versions
NetappTridentAll versions
OracleTimesten In-Memory Database< 21.1.1.1.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-34558?
The crypto/tls package of Go through 1.16.5 does not properly assert that the type of public key in an X.509 certificate matches the expected type when doing a RSA based key exchange, allowing a malicious TLS server to cause a TLS client to panic.
How severe is CVE-2021-34558?
CVE-2021-34558 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 7.03% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34558?
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-2021-34558?

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

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Source: NVD / NIST