6.5

CVE-2021-34558: fedoraproject fedora Improper Certificate Validation

Modified
AliasesSUSE-SU-2021:2392-1SUSE-SU-2021:2398-1RHEA-2021:3287
Published 15-07-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-34558 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in fedoraproject fedora. EPSS estimates a 6.98% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
6.98%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 2
MGASA-2021-0369MGASA-2023-0213OPENSUSE-SU-2024:10808-1OPENSUSE-SU-2024:10809-1RHBA-2021:2979RHSA-2021:2984

Timeline

  1. 15-07-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

6.98%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

No change 0.00 pp

From 6.98% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat13 products
  • go-toolset-1.15< 0:1.15.14-1.el7_9
  • go-toolset-1.15-build< 0:1.15.14-1.el7_9
  • go-toolset-1.15-golang< 0:1.15.14-1.el7_9
  • go-toolset-1.15-golang-bin< 0:1.15.14-1.el7_9
  • go-toolset-1.15-golang-docs< 0:1.15.14-1.el7_9
Ubuntu7 products
  • golang-1.10All versions (No fix recorded)
  • golang-1.13All versions (No fix recorded)
  • golang-1.14All versions (No fix recorded)
  • golang-1.16All versions (No fix recorded)
  • golang-1.6All versions (No fix recorded)
Opensuse4 products
  • go1.15&distro=openSUSE Leap 15.2< 1.15.14-lp152.23.1
  • go1.15&distro=openSUSE Leap 15.3< 1.15.14-1.36.1
  • go1.16&distro=openSUSE Leap 15.2< 1.16.6-lp152.5.1
  • go1.16&distro=openSUSE Leap 15.3< 1.16.6-1.20.1
Suse4 products
  • go1.15&distro=SUSE Linux Enterprise Module for Development Tools 15 SP2< 1.15.14-1.36.1
  • go1.15&distro=SUSE Linux Enterprise Module for Development Tools 15 SP3< 1.15.14-1.36.1
  • go1.16&distro=SUSE Linux Enterprise Module for Development Tools 15 SP2< 1.16.6-1.20.1
  • go1.16&distro=SUSE Linux Enterprise Module for Development Tools 15 SP3< 1.16.6-1.20.1
Netapp3 products
Alpine1 product
  • go≥ 1.16.0, < 1.15.14-r0 | ≥ 1.16.0, < 1.16.6-r0
Debian1 product
  • golang-1.15< 1.15.9-6
Fedoraproject1 product
Go1 product
  • stdlib≥ 1.16.0-0, < 1.16.6
Golang1 product
  • go< 1.15.14 | ≥ 1.16.0, < 1.16.6
Oracle1 product

11 vendors · 37 products

References

56 links
Show all 56 references