CVE-2021-34558

moderate-risk

Published 2021-07-15

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.

Do I need to act?

0.92% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.5/10 Medium

NETWORK / LOW complexity

Affected Products (7)

Fedora

Cloud Insights Telegraf

Storagegrid

Trident

Timesten In-Memory Database

Affected Vendors

Oracle Fedoraproject Netapp Golang

References (32)

Release Notes https://golang.org/doc/devel/release#go1.16.minor

Mailing List https://groups.google.com/g/golang-announce

Mailing List https://groups.google.com/g/golang-announce/c/n9FxMelZGAQ

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202208-02

Third Party Advisory https://security.netapp.com/advisory/ntap-20210813-0005/

Patch https://www.oracle.com/security-alerts/cpujan2022.html

Patch https://www.oracle.com/security-alerts/cpuoct2021.html

Release Notes https://golang.org/doc/devel/release#go1.16.minor

Mailing List https://groups.google.com/g/golang-announce

Mailing List https://groups.google.com/g/golang-announce/c/n9FxMelZGAQ

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

and 12 more references

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 3/34 · Minimal

Exposure 14/34 · Moderate