ProFTPD < 1.3.3g / 1.3.4 Response Pool Use-After-Free Code Execution

high Nessus Plugin ID 56956
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote FTP server is affected by a code execution vulnerability.


The remote host is using ProFTPD, a free FTP server for Unix and Linux.

According to its banner, the version of ProFTPD installed on the remote host is earlier than 1.3.3g or 1.3.4. As such, it is potentially affected by a code execution vulnerability due to how the server manages the response pool that is used to send responses from the server to the client. A remote, authenticated attacker could leverage this issue to execute arbitrary code on the remote host, subject to the privileges of the user running the affected application.

Note that Nessus did not actually test for the flaw but instead has relied on the version in ProFTPD's banner.


Upgrade to ProFTPD version 1.3.3g / 1.3.4 or later.

See Also

Plugin Details

Severity: High

ID: 56956

File Name: proftpd_1_3_3g.nasl

Version: 1.11

Type: remote

Family: FTP

Published: 11/28/2011

Updated: 3/27/2020

Dependencies: ftpserver_detect_type_nd_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2011-4130


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:*

Required KB Items: Settings/ParanoidReport, ftp/proftpd

Exploit Ease: No known exploits are available

Patch Publication Date: 11/9/2011

Vulnerability Publication Date: 11/11/2011

Reference Information

CVE: CVE-2011-4130

BID: 50631