CVE-2021-4209

2022-02-2200:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.002 Low

EPSS

Percentile

58.4%

JSON

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.

Bugs

<https://gitlab.com/gnutls/gnutls/-/issues/1306>

OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchgnutls26< anyUNKNOWN
ubuntu18.04noarchgnutls28< 3.5.18-1ubuntu1.6UNKNOWN
ubuntu20.04noarchgnutls28< 3.6.13-2ubuntu1.7UNKNOWN
ubuntu16.04noarchgnutls28< 3.4.10-4ubuntu1.9+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	14.04	noarch	gnutls26	< any	UNKNOWN
ubuntu	18.04	noarch	gnutls28	< 3.5.18-1ubuntu1.6	UNKNOWN
ubuntu	20.04	noarch	gnutls28	< 3.6.13-2ubuntu1.7	UNKNOWN
ubuntu	16.04	noarch	gnutls28	< 3.4.10-4ubuntu1.9+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN