OpenSSH < 3.2.3 YP Netgroups Authentication Bypass

high Nessus Plugin ID 44072

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Synopsis

The remote SSH server has an authentication bypass vulnerability.

Description

According to its banner, the version of OpenSSH running on the remote host is older than 3.2.3. It therefore may be affected by an authentication bypass issue. On systems using YP with netgroups, sshd authenticates users via ACL by checking for the requested username and password. Under certain conditions when doing ACL checks, it may instead use the password entry of a different user for authentication. This means unauthorized users could authenticate successfully, and authorized users could be locked out.

Solution

Upgrade to OpenSSH 3.2.3 or later.

Plugin Details

Severity: High

ID: 44072

File Name: openssh_323.nasl

Version: 1.6

Type: remote

Family: Gain a shell remotely

Published: 10/4/2011

Updated: 3/27/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Required KB Items: installed_sw/OpenSSH

Exploit Ease: No known exploits are available

Patch Publication Date: 5/22/2002

Vulnerability Publication Date: 5/16/2002

Reference Information

CVE: CVE-2002-0765

BID: 4803

Detections

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