Ubuntu 16.04 LTS / 18.04 LTS / 19.10 : sudo vulnerability (USN-4263-1)

high Nessus Plugin ID 133449

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Joe Vennix discovered that Sudo incorrectly handled memory operations when the pwfeedback option is enabled. A local attacker could possibly use this issue to obtain unintended access to the administrator account.

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 sudo and / or sudo-ldap packages.

See Also

https://usn.ubuntu.com/4263-1/

Plugin Details

Severity: High

ID: 133449

File Name: ubuntu_USN-4263-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2/4/2020

Updated: 2/12/2020

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

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:sudo, p-cpe:/a:canonical:ubuntu_linux:sudo-ldap, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.10

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/3/2020

Vulnerability Publication Date: 1/29/2020

Reference Information

CVE: CVE-2019-18634

USN: 4263-1