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Debian DLA-1650-1 : rssh security update

high Nessus Plugin ID 121482

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Synopsis

The remote Debian host is missing a security update.

Description

The ESnet security team discovered a vulnerability in rssh, a restricted shell that allows users to perform only scp, sftp, cvs, svnserve (Subversion), rdist and/or rsync operations. Missing validation in the scp support could result in the bypass of this restriction, allowing the execution of arbitrary shell commands.

Please note that with the update applied, the '-3' option of scp can no longer be used.

For Debian 8 'Jessie', this problem has been fixed in version 2.3.4-4+deb8u1.

We recommend that you upgrade your rssh packages.

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

Solution

Upgrade the affected rssh package.

See Also

https://lists.debian.org/debian-lts-announce/2019/01/msg00027.html

https://packages.debian.org/source/jessie/rssh

Plugin Details

Severity: High

ID: 121482

File Name: debian_DLA-1650.nasl

Version: 1.6

Type: local

Agent: unix

Published: 1/31/2019

Updated: 6/25/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2019-1000018

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:rssh

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/30/2019

Vulnerability Publication Date: 2/4/2019

Reference Information

CVE: CVE-2019-1000018