This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2021-4209 →

DEBIAN-CVE-2021-4209

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause u...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 gnutls28

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2"}]}]

Debian:13 gnutls28

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2"}]}]

Debian:14 gnutls28

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.3-2"}]}]

References

advisory security-tracker.debian.org