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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : rssh vulnerabilities (USN-3946-1)

critical Nessus Plugin ID 124019

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3946-1 advisory.

 It was discovered that rssh incorrectly handled certain command-line arguments and environment variables.
 An authenticated user could bypass rssh's command restrictions, allowing an attacker to run arbitrary commands.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

Solution

Update the affected rssh package.

See Also

https://ubuntu.com/security/notices/USN-3946-1

Plugin Details

Severity: Critical

ID: 124019

File Name: ubuntu_USN-3946-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 4/12/2019

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-3464

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:rssh, cpe:/o:canonical:ubuntu_linux:16.04:-:lts

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: 4/11/2019

Vulnerability Publication Date: 2/4/2019

Reference Information

CVE: CVE-2019-1000018, CVE-2019-3463, CVE-2019-3464

USN: 3946-1