GNU Bash Environment Variable Handling Code Injection via ProFTPD (Shellshock)
high Nessus Plugin ID 77986
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Synopsis
The remote FTP server is affected by a remote code execution vulnerability.Description
The remote FTP server is affected by a remote code execution vulnerability due to an error in the Bash shell running on the remote host. A remote, unauthenticated attacker can execute arbitrary code on the remote host by sending a specially crafted request via the USER FTP command. The 'mod_exec' module exports the attacker-supplied username as an environment variable, which is then evaluated by Bash as code.Solution
Apply the referenced patch.See Also
http://www.proftpd.org/docs/contrib/mod_exec.html#ExecEnviron
http://seclists.org/oss-sec/2014/q3/650
Plugin Details
Severity: High
ID: 77986
File Name: proftpd_bash_injection.nasl
Version: 1.23
Type: remote
Family: FTP
Published: 9/30/2014
Updated: 2/24/2021
Dependencies: ftpserver_detect_type_nd_version.nasl, ftp_starttls.nasl
Risk Information
CVSS Score Source: CVE-2014-7169
VPR
Risk Factor: Critical
Score: 9.9
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 8.7
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal Vector: E:H/RL:OF/RC:C
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 8.4
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: E:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:gnu:bash, cpe:/a:proftpd:proftpd
Excluded KB Items: global_settings/supplied_logins_only
Exploit Available: true
Exploit Ease: Exploits are available
Exploited by Nessus: true
Patch Publication Date: 9/24/2014
Vulnerability Publication Date: 9/24/2014
Exploitable With
Core Impact
Metasploit (Apache mod_cgi Bash Environment Variable Code Injection (Shellshock))
Reference Information
CVE: CVE-2014-6271, CVE-2014-7169