Ubuntu 16.04 LTS / 18.04 LTS : GnuTLS update (USN-4233-2)

high Nessus Plugin ID 133224

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Synopsis

The remote Ubuntu host is missing a security update.

Description

USN-4233-1 disabled SHA1 being used for digital signature operations in GnuTLS. In certain network environments, certificates using SHA1 may still be in use. This update adds the %VERIFY_ALLOW_BROKEN and %VERIFY_ALLOW_SIGN_WITH_SHA1 priority strings that can be used to temporarily re-enable SHA1 until certificates can be replaced with a stronger algorithm.

As a security improvement, this update marks SHA1 as being untrusted for digital signature operations.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 133224

File Name: ubuntu_USN-4233-2.nasl

Version: 1.5

Type: local

Agent: unix

Family: Ubuntu Local Security Checks

Published: 1/24/2020

Updated: 10/21/2023

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libgnutls30, p-cpe:/a:canonical:ubuntu_linux:libgnutlsxx28, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:gnutls-bin, p-cpe:/a:canonical:ubuntu_linux:guile-gnutls, p-cpe:/a:canonical:ubuntu_linux:libgnutls-dane0, p-cpe:/a:canonical:ubuntu_linux:libgnutls-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls-openssl27, p-cpe:/a:canonical:ubuntu_linux:libgnutls28-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/23/2020

Vulnerability Publication Date: 1/23/2020

Reference Information

USN: 4233-2

Detections

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