CVE-2021-20231

CWE-416 — Use After Free8 documents8 sources
Severity
9.8CRITICAL
EPSS
1.2%
top 21.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
GNU GnutlsFedoraproject FedoraRedhat Enterprise Linux
Timeline
PublishedMar 12
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages3 packages

▶NVDgnu/gnutls3.6.3 — 3.7.1
▶Debiangnutls28< 3.7.1-1+3
▶CVEListV5gnutlsgnutls 3.7.1

Also affects: Fedora 34, Enterprise Linux 8.0

Patches

Patch: bugzilla.redhat.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-mqq9-xchh-h97q: A flaw was found in gnutls↗2022-05-24
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CVEList
CVE-2021-20231: A flaw was found in gnutls↗2021-03-12
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OSV
CVE-2021-20231: A flaw was found in gnutls↗2021-03-12
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📋Vendor Advisories

4
Ubuntu
GnuTLS vulnerabilities↗2021-08-02
▶
Red Hat
gnutls: Use after free in client key_share extension↗2021-03-12
▶
Microsoft
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.↗2021-03-09
▶
Debian
CVE-2021-20231: gnutls28 - A flaw was found in gnutls. A use after free issue in client sending key_share e...↗2021
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CVE-2021-20231 (CRITICAL CVSS 9.8) | A flaw was found in gnutls | cvebase.io