Unpassworded 'bash' Backdoor Account

Critical Nessus Plugin ID 15583

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.

See Also

http://www.nessus.org/u?231c3c89

Plugin Details

Severity: Critical

ID: 15583

File Name: account_bash.nasl

Version: 1.28

Type: remote

Family: Backdoors

Published: 2004/10/30

Modified: 2018/06/14

Dependencies: 55900, 10267, 17975

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Temporal Score: 8.6

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

Temporal Vector: CVSS2#E:F/RL:TF/RC:ND

CVSSv3

Base Score: 9.8

Temporal Score: 9.1

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: 2001/01/01

Exploitable With

Metasploit (SSH User Code Execution)

Reference Information

CVE: CVE-1999-0502