Unpassworded 'bash' Backdoor Account

critical Nessus Plugin ID 15583

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Synopsis

The remote host has an account with a blank password.

Description

The account 'bash' has no password set. An attacker may use it to gain further privileges on this system.

This account was likely created by a backdoor installed by a fake Linux RedHat patch.

Solution

Disable this account and check your system.

Plugin Details

Severity: Critical

ID: 15583

File Name: account_bash.nasl

Version: 1.30

Type: remote

Family: Backdoors

Published: 10/30/2004

Updated: 4/3/2023

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information

CVSS Score Rationale: Score based on analysis of the vulnerability.

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.6

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

CVSS Score Source: manual

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.2

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:F/RL:T/RC:X

Vulnerability Information

Excluded KB Items: global_settings/supplied_logins_only

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 1/1/2001

Exploitable With

Metasploit (SSH User Code Execution)

Reference Information

CVE: CVE-1999-0502

Detections

Analytics