OpenSSH < 3.0.2 UseLogin Environment Variable Local Command Execution

high Nessus Network Monitor Plugin ID 1992

Synopsis

The remote host is vulnerable to a flaw that allows for the bypassing of authentication.

Description

The remote host is running a version of OpenSSH that is older than 3.0.2. Versions prior than 3.0.2 are vulnerable to an environment variables export that can allow a local user to execute command with root privileges. This problem affects only versions prior than 3.0.2 when the UseLogin feature is enabled (usually disabled by default).

Note: NNM has solely relied on the banner of the SSH client to perform this check. Any backported patches or workarounds such as recompiling or edited configurations are not observable through the banner.

Solution

Upgrade to OpenSSH 3.0.2 or higher.

Plugin Details

Severity: High

ID: 1992

Family: SSH

Published: 8/20/2004

Updated: 3/6/2019

Nessus ID: 10823

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

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

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

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Reference Information

CVE: CVE-2001-0872

BID: 3614

Detections

Analytics