CVE-2021-4209
Published: 22 February 2022
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.
Priority
Status
Package | Release | Status |
---|---|---|
gnutls26 Launchpad, Ubuntu, Debian |
focal |
Does not exist
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Needs triage
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
jammy |
Does not exist
|
|
gnutls28 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.5.18-1ubuntu1.6)
|
focal |
Released
(3.6.13-2ubuntu1.7)
|
|
impish |
Ignored
(end of life)
|
|
kinetic |
Not vulnerable
(3.7.6-2ubuntu1)
|
|
lunar |
Not vulnerable
(3.7.6-2ubuntu1)
|
|
upstream |
Released
(3.7.3)
|
|
xenial |
Released
(3.4.10-4ubuntu1.9+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
trusty |
Ignored
(end of standard support)
|
|
jammy |
Not vulnerable
(3.7.3-4ubuntu1)
|
|
Patches: upstream: https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |