CVE-2021-4209
MEDIUM6.5EPSS 0.37%gnutls28 - security update
Published: 8/24/2022Modified: 4/28/2026
Description
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.
Affected packages (2)
- Debian/gnutls28from 0, < 3.7.1-5+deb11u1
- Debian/gnutls28from 0, < 3.6.7-4+deb10u9
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |