ProFTPD < 1.3.3c Multiple Vulnerabilities

critical Nessus Plugin ID 50544


The remote FTP server is affected by multiple vulnerabilities.


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 1.3.3c. Such versions are reportedly affected by the following vulnerabilities :

- When ProFTPD is compiled with 'mod_site_misc' and a directory is writable, a user can use 'mod_site_misc' to create or delete a directory outside the writable directory, create a symlink located outside the writable directory, or change the time of a file located outside the writable directory. (Bug #3519)

- A stack-based buffer overflow exists in the server's 'pr_netio_telnet_gets()' function, which can be triggered by when reading user input containing a TELNET_IAC escape sequence. (Bug #3521)

Note that Nessus did not actually test for the flaws but instead has relied on the version in ProFTPD's banner so this may be a false positive.


Upgrade to ProFTPD version 1.3.3c or later.

See Also

Plugin Details

Severity: Critical

ID: 50544

File Name: proftpd_1_3_3c.nasl

Version: 1.19

Type: remote

Family: FTP

Published: 11/10/2010

Updated: 3/27/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information


Risk Factor: High

Score: 7.4


Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

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

CVSS Score Source: CVE-2010-4221

Vulnerability Information

CPE: cpe:/a:proftpd:proftpd

Required KB Items: ftp/proftpd, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/29/2010

Vulnerability Publication Date: 11/1/2010

Exploitable With

Core Impact

Metasploit (ProFTPD 1.3.2rc3 - 1.3.3b Telnet IAC Buffer Overflow (Linux))

Reference Information

CVE: CVE-2010-3867, CVE-2010-4221

BID: 44562

Secunia: 42052