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.
9.4	$0-$5k	0.00

A vulnerability has been found in Secure Telnet 0.13 (Remote Access Software) and classified as very critical. This vulnerability affects the function SSL_set_verify of the file telnetd.c. The manipulation with an unknown input leads to a format string vulnerability. The CWE definition for the vulnerability is CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Format string vulnerability in the SSL_set_verify function in telnetd.c for SSLtelnet daemon (SSLtelnetd) 0.13 allows remote attackers to execute arbitrary code.

The bug was discovered 07/08/2004. The weakness was shared 08/06/2004 by iDefense with iDEFENSE (Website). The advisory is available at debian.org. This vulnerability was named CVE-2004-0640 since 07/08/2004. 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 known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/02/2019).

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 15366 (Debian DSA-529-1 : netkit-telnet-ssl - format string), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading 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 (16653) and Tenable (15366).

Productinfo

Type

• Remote Access Software

Name

• Secure Telnet

Version

• 0.13

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
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: Format string
CWE: CWE-134 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 15366
Nessus Name: Debian DSA-529-1 : netkit-telnet-ssl - format string
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53218
OpenVAS Name: Debian Security Advisory DSA 529-1 (netkit-telnet-ssl)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/08/2004 🔍
07/08/2004 +0 days 🔍
07/08/2004 +0 days 🔍
07/09/2004 +1 days 🔍
07/17/2004 +8 days 🔍
08/06/2004 +20 days 🔍
08/06/2004 +0 days 🔍
09/29/2004 +54 days 🔍
06/22/2005 +266 days 🔍
12/05/2014 +3453 days 🔍
06/02/2019 +1640 days 🔍

Sourcesinfo

Advisory: debian.org
Researcher: iDefense
Organization: iDEFENSE
Status: Not defined

CVE: CVE-2004-0640 (🔍)
X-Force: 16653
Vulnerability Center: 8402 - SSLtelnetd Allows Obtaining Root Access via telnetd.c File, Critical
SecurityFocus: 10684 - SSLTelnetd Remote Syslog Format String Vulnerability
OSVDB: 7594 - CVE-2004-0640 - SSLtelnetd - Format String Issue

Entryinfo

Created: 12/05/2014 16:05
Updated: 06/02/2019 17:04
Changes: 12/05/2014 16:05 (68), 06/02/2019 17:04 (10)
Complete: 🔍

Discussion

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