CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

A vulnerability was found in Pragma Systems FortressSSH 4.0.7.20. It has been rated as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in Pragma FortressSSH 4.0.7.20 allows remote attackers to execute arbitrary code via long SSH_MSG_KEXINIT messages, which may cause an overflow when being logged. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

The bug was discovered 05/16/2006. The weakness was published 05/17/2006 by Gerry Eisenhaur with isen (Website). It is possible to read the advisory at vupen.com. The identification of this vulnerability is CVE-2006-2421 since 05/17/2006. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 21589 (FortressSSH SSH_MSG_KEXINIT Logging Remote Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (26498) and Tenable (21589).

Productinfo

Vendor

• Pragma Systems

Name

• FortressSSH

Version

• 4.0.7.20

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 21589
Nessus Name: FortressSSH SSH_MSG_KEXINIT Logging Remote Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/16/2006 🔍
05/16/2006 +0 days 🔍
05/17/2006 +1 days 🔍
05/17/2006 +0 days 🔍
05/17/2006 +0 days 🔍
05/17/2006 +0 days 🔍
05/23/2006 +6 days 🔍
05/29/2006 +6 days 🔍
03/12/2015 +3209 days 🔍
06/19/2019 +1560 days 🔍

Sourcesinfo

Advisory: vupen.com⛔
Researcher: Gerry Eisenhaur
Organization: isen
Status: Not defined

CVE: CVE-2006-2421 (🔍)
X-Force: 26498
Vulnerability Center: 11666 - FortressSSH Arbitrary Code Execution via Long SSH_MSG_KEXINIT Messages, Critical
SecurityFocus: 17991 - Pragma FortressSSH SSH_MSG_KEXINIT Remote Buffer Overflow Vulnerability
Secunia: 20114
OSVDB: 25535 - CVE-2006-2421 - Pragma - FortressSSH -Remote Buffer Overflow Issue
Vupen: ADV-2006-1820

Entryinfo

Created: 03/12/2015 12:19
Updated: 06/19/2019 12:55
Changes: 03/12/2015 12:19 (66), 06/19/2019 12:55 (5)
Complete: 🔍

Discussion

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