Cyber Resilience

CVE-2021-4209

Medium

Published: 24 August 2022

Published
24 August 2022
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0037 59.0th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-4209 is a medium-severity NULL Pointer Dereference (CWE-476) vulnerability in Gnu Gnutls. Its CVSS base score is 6.5 (Medium).

Operationally, ranked in the top 41.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

CWE(s)
CWE-476

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

gnu
gnutls
≤ 3.7.3
redhat
enterprise linux
8.0
netapp
active iq unified manager
all versions
netapp
solidfire \& hci management node
all versions
netapp
hci bootstrap os
all versions

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References