Serv-U FTP Server 7.0.0.3 path traversal

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

A vulnerability classified as critical was found in Serv-U FTP Server 7.0.0.3 (File Transfer Software). This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity. CVE summarizes:

Directory traversal vulnerability in the FTP server in Rhino Software Serv-U File Server 7.0.0.1 through 7.4.0.1 allows remote attackers to create arbitrary directories via a \.. (backslash dot dot) in an MKD request.

The bug was discovered 03/16/2009. The weakness was shared 03/19/2009 by Jonathan Salwan (Website). The advisory is shared for download at xforce.iss.net. This vulnerability was named CVE-2009-1031 since 03/19/2009. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

A public exploit has been developed in Perl and been published before and not just after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 36035 (Serv-U < 8.0.0.1 Multiple Vulnerabilities (DoS, Traversal)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FTP and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 27300 (Serv-U FTP Server "MKD" Command Directory Traversal Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49258), Tenable (36035) and Exploit-DB (8211). The entry 47202 is related to this item.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
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CVSSv2info

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Exploitinginfo

Class: Path traversal
CWE: CWE-22
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ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
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Nessus ID: 36035
Nessus Name: Serv-U < 8.0.0.1 Multiple Vulnerabilities (DoS, Traversal)
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OpenVAS ID: 900483
OpenVAS Name: Rhinosoft Serv-U FTP Multiple Vulnerabilities
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Timelineinfo

03/16/2009 🔍
03/16/2009 +0 days 🔍
03/16/2009 +0 days 🔍
03/16/2009 +0 days 🔍
03/17/2009 +1 days 🔍
03/17/2009 +0 days 🔍
03/19/2009 +1 days 🔍
03/19/2009 +0 days 🔍
03/19/2009 +0 days 🔍
03/23/2009 +4 days 🔍
03/27/2009 +4 days 🔍
03/30/2009 +3 days 🔍
03/17/2015 +2178 days 🔍
08/31/2019 +1628 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Researcher: Jonathan Salwan
Status: Not defined

CVE: CVE-2009-1031 (🔍)
X-Force: 49258
Vulnerability Center: 21414 - RhinoSoft Serv-U FTP Server 7.4.0.1 Remote Directory Traversal Vulnerability via MKD Request, High
SecurityFocus: 34125 - RhinoSoft Serv-U FTP Server 'MKD' Command Directory Traversal Vulnerability
Secunia: 34329 - Serv-U "MKD" Directory Traversal Vulnerability, Not Critical
OSVDB: 52773 - Serv-U FTP Server MKD Command Handling Traversal Arbitrary Directory Creation
Vupen: ADV-2009-0738

scip Labs: https://www.scip.ch/en/?labs.20161013
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Entryinfo

Created: 03/17/2015 23:38
Updated: 08/31/2019 16:03
Changes: 03/17/2015 23:38 (90), 08/31/2019 16:03 (3)
Complete: 🔍

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