Rhinosoft Serv-U FTP Server up to 6.1.0.4 denial of service

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

A vulnerability was found in Rhinosoft Serv-U FTP Server up to 6.1.0.4 (File Transfer Software). It has been declared as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

The SSL/TLS server implementation in OpenSSL 0.9.7 before 0.9.7h and 0.9.8 before 0.9.8a, when using the SSL_OP_MSIE_SSLV2_RSA_PADDING option, disables a verification step that is required for preventing protocol version rollback attacks, which allows remote attackers to force a client and server to use a weaker protocol than needed via a man-in-the-middle attack.

The bug was discovered 10/11/2005. The weakness was released 11/02/2005 with Serv-U Team (Website). The advisory is shared at serv-u.com. This vulnerability is known as CVE-2005-2969 since 09/19/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 20031 (GLSA-200510-11 : OpenSSL: SSL 2.0 protocol rollback), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185030 (HP-UX Running OpenSSL Multiple Vulnerabilities (HPSBUX02174)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at serv-u.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 3892.

The vulnerability is also documented in the databases at X-Force (22559) and Tenable (20031). Entries connected to this vulnerability are available at 1786, 1803, 1846 and 1844.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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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
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 20031
Nessus Name: GLSA-200510-11 : OpenSSL: SSL 2.0 protocol rollback
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 55751
OpenVAS Name: Debian Security Advisory DSA 875-1 (openssl094)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: serv-u.com
TippingPoint: 🔍

Timelineinfo

09/19/2005 🔍
10/11/2005 +22 days 🔍
10/11/2005 +0 days 🔍
10/11/2005 +0 days 🔍
10/18/2005 +7 days 🔍
10/19/2005 +1 days 🔍
10/23/2005 +4 days 🔍
10/27/2005 +4 days 🔍
11/02/2005 +6 days 🔍
11/02/2005 +0 days 🔍
11/02/2005 +0 days 🔍
11/07/2005 +4 days 🔍
11/30/2005 +23 days 🔍
07/05/2019 +4965 days 🔍

Sourcesinfo

Advisory: serv-u.com
Researcher: http://www.serv-u.com
Organization: Serv-U Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2969 (🔍)
OVAL: 🔍

X-Force: 22559
SecurityTracker: 1015032
Vulnerability Center: 9438 - [cisco-response-20051202-openssl, cisco-sr-20051202-openssl] OpenSSL Protocol Weakness Enables Man-In-The-Middle Attacks, Low
SecurityFocus: 15647 - RETIRED: Apple Mac OS X Security Update 2005-009 Multiple Vulnerabilities
Secunia: 17409 - Serv-U FTP Server Potential Denial of Service Vulnerability, Moderately Critical
OSVDB: 20449 - Serv-U FTP Server Unspecified Malformed Packet Remote DoS
Vupen: ADV-2005-2710

See also: 🔍

Entryinfo

Created: 11/07/2005 10:44
Updated: 07/05/2019 09:21
Changes: 11/07/2005 10:44 (100), 07/05/2019 09:21 (1)
Complete: 🔍

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