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Ubuntu 16.04 ESM : GnuTLS vulnerability (USN-5750-1)

medium Nessus Plugin ID 168312

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM host has packages installed that are affected by a vulnerability as referenced in the USN-5750-1 advisory.

 - 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. (CVE-2021-4209)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-5750-1

Plugin Details

Severity: Medium

ID: 168312

File Name: ubuntu_USN-5750-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 11/30/2022

Updated: 7/10/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2021-4209

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:gnutls-bin, p-cpe:/a:canonical:ubuntu_linux:guile-gnutls, p-cpe:/a:canonical:ubuntu_linux:libgnutls-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls-openssl27, p-cpe:/a:canonical:ubuntu_linux:libgnutls28-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls30, p-cpe:/a:canonical:ubuntu_linux:libgnutlsxx28

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 11/30/2022

Vulnerability Publication Date: 8/24/2022

Reference Information

CVE: CVE-2021-4209

USN: 5750-1