ProFTPD 1.3.4e/1.3.5 mod_copy cpfr/cpto File access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in ProFTPD 1.3.4e/1.3.5 (File Transfer Software). It has been declared as critical. This vulnerability affects an unknown code of the component mod_copy. The manipulation of the argument cpfr/cpto with an unknown input leads to a access control vulnerability (File). The CWE definition for the vulnerability is CWE-284. The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 05/18/2015 (Website). The advisory is shared for download at This vulnerability was named CVE-2015-3306 since 04/15/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

A public exploit has been developed in Ruby and been published even before and not after the advisory. It is declared as highly functional. It is possible to download the exploit at The vulnerability was handled as a non-public zero-day exploit for at least 35 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 83752 (FreeBSD : proftpd -- arbitrary code execution vulnerability with chroot (d0034536-ff24-11e4-a072-d050996490d0)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167931 (OpenSuSE Security Update for proftpd (openSUSE-SU-2015:1031-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at The vulnerability will be addressed with the following lines of code:

#Uncomment the following line
#LoadModule mod_copy.c
Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19839.

The vulnerability is also documented in the databases at Vulnerability Center (SBV-50226), Tenable (83752) and Exploit-DB (36742). Entry connected to this vulnerability is available at 10259.





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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Name: File
Class: Access control / File
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Programming Language: 🔍
Download: 🔍

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Nessus ID: 83752
Nessus Name: FreeBSD : proftpd -- arbitrary code execution vulnerability with chroot (d0034536-ff24-11e4-a072-d050996490d0)
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OpenVAS ID: 703263
OpenVAS Name: Debian Security Advisory DSA 3263-1 (proftpd-dfsg - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/proftpd_mod_copy
Saint Name: ProFTPD mod_copy command execution

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: proftpd_modcopy_exec.rb
MetaSploit Name: ProFTPD 1.3.5 Mod_Copy Command Execution
MetaSploit File: 🔍

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Threat Intelligenceinfo

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Recommended: Patch
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TippingPoint: 🔍

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01/01/2014 🔍
04/13/2015 +467 days 🔍
04/13/2015 +0 days 🔍
04/15/2015 +2 days 🔍
04/20/2015 +5 days 🔍
05/18/2015 +28 days 🔍
05/18/2015 +0 days 🔍
05/19/2015 +1 days 🔍
05/19/2015 +0 days 🔍
05/21/2015 +2 days 🔍
05/17/2022 +2553 days 🔍


Advisory: 131505
Status: Confirmed

CVE: CVE-2015-3306 (🔍)

Vulnerability Center: 50226 - ProFTPD 1.3.5 Remote File System Read and Write Vulnerabilities, Critical
SecurityFocus: 74238 - ProFTPD CVE-2015-3306 Information Disclosure Vulnerabilities

scip Labs:
See also: 🔍


Created: 05/19/2015 10:27 AM
Updated: 05/17/2022 09:24 PM
Changes: 05/19/2015 10:27 AM (83), 06/29/2017 07:15 AM (11), 05/17/2022 09:15 PM (3), 05/17/2022 09:24 PM (1)
Complete: 🔍


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