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Ubuntu 18.04 LTS : GnuPG vulnerability (USN-5431-1)

high Nessus Plugin ID 161663

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5431-1 advisory.

 - Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack. (CVE-2019-13050)

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-5431-1

Plugin Details

Severity: High

ID: 161663

File Name: ubuntu_USN-5431-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/30/2022

Updated: 7/10/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2019-13050

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:gpg, p-cpe:/a:canonical:ubuntu_linux:gpg-agent, p-cpe:/a:canonical:ubuntu_linux:gpg-wks-client, p-cpe:/a:canonical:ubuntu_linux:gpg-wks-server, p-cpe:/a:canonical:ubuntu_linux:gpgconf, p-cpe:/a:canonical:ubuntu_linux:gpgsm, p-cpe:/a:canonical:ubuntu_linux:gpgv, p-cpe:/a:canonical:ubuntu_linux:gpgv-static, p-cpe:/a:canonical:ubuntu_linux:gpgv-win32, p-cpe:/a:canonical:ubuntu_linux:gpgv2, p-cpe:/a:canonical:ubuntu_linux:scdaemon, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:dirmngr, p-cpe:/a:canonical:ubuntu_linux:gnupg, p-cpe:/a:canonical:ubuntu_linux:gnupg-agent, p-cpe:/a:canonical:ubuntu_linux:gnupg-l10n, p-cpe:/a:canonical:ubuntu_linux:gnupg-utils, p-cpe:/a:canonical:ubuntu_linux:gnupg2

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/30/2022

Vulnerability Publication Date: 6/29/2019

Reference Information

CVE: CVE-2019-13050

USN: 5431-1