Serv-U up to 9.1.0.0 memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Serv-U. Impacted is an unknown function. Such manipulation leads to memory corruption. This vulnerability is listed as CVE-2009-4006. In addition, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Serv-U (File Transfer Software). It has been rated as very critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in the TEA decoding algorithm in RhinoSoft Serv-U FTP server 7.0.0.1, 9.0.0.5, and other versions before 9.1.0.0 allows remote attackers to execute arbitrary code via a long hexadecimal string.

The weakness was presented 11/18/2009 with Secunia Research (Website). The advisory is available at xforce.iss.net. This vulnerability is handled as CVE-2009-4006. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/17/2025).

The exploit is available at exploit-db.com. It is declared as highly functional. The vulnerability scanner Nessus provides a plugin with the ID 42934 (Serv-U < 9.1.0.0), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FTP.

Upgrading to version 7.2.0.0 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (54322), Exploit-DB (16775), Tenable (42934), SecurityFocus (BID 37051†) and OSVDB (60427†). See VDB-53351 for similar entry. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 42934
Nessus Name: Serv-U < 9.1.0.0
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 100354
OpenVAS Name: RhinoSoft Serv-U FTP Server TEA Decoder Remote Stack Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

MetaSploit ID: servu_session_cookie.rb
MetaSploit Name: Rhinosoft Serv-U Session Cookie Buffer Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Serv-U 7.2.0.0
Fortigate IPS: 🔍

Timelineinfo

11/17/2009 🔍
11/18/2009 +1 days 🔍
11/18/2009 +0 days 🔍
11/18/2009 +0 days 🔍
11/19/2009 +0 days 🔍
11/20/2009 +1 days 🔍
11/21/2009 +1 days 🔍
11/30/2009 +8 days 🔍
12/07/2009 +7 days 🔍
03/18/2015 +1927 days 🔍
11/17/2025 +3897 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Organization: Secunia Research
Status: Confirmed

CVE: CVE-2009-4006 (🔍)
GCVE (CVE): GCVE-0-2009-4006
GCVE (VulDB): GCVE-100-50858

OVAL: 🔍

X-Force: 54322
SecurityFocus: 37051 - RhinoSoft Serv-U FTP Server TEA Decoder Remote Stack Buffer Overflow Vulnerability
Secunia: 37228
OSVDB: 60427 - Serv-U FTP Server TEA Decoding Algorithm Hexidecimal String Remote Overflow
SecurityTracker: 1023199
Vulnerability Center: 24278 - RhinoSoft Serv-U FTP Server \x3C 9.1.0.0 TEA Decoding Algorithm Remote Code Execution Vulnerability, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 11/17/2025 05:07
Changes: 03/18/2015 15:15 (67), 02/17/2017 12:30 (10), 08/28/2021 01:19 (2), 08/28/2021 01:26 (1), 12/29/2024 03:56 (17), 02/03/2025 07:55 (1), 04/23/2025 14:19 (2), 11/17/2025 05:07 (4)
Complete: 🔍
Cache ID: 216:501:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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