Heiko Stamer Openskat 2.0 checkgroup cryptographic issue

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.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in Heiko Stamer Openskat 2.0. This issue affects the function checkgroup. Such manipulation leads to cryptographic issue. This vulnerability is listed as CVE-2004-2721. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Heiko Stamer Openskat 2.0. It has been rated as problematic. Affected by this issue is the function checkgroup. The manipulation with an unknown input leads to a cryptographic issue vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality. CVE summarizes:

The CheckGroup function in openSkat VTMF before 2.1 generates public key pairs in which the "p" variable might not be prime, which allows remote attackers to determine the private key and decrypt messages.

The weakness was presented 11/10/2004 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2004-2721 since 10/06/2007. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.

Upgrading to version 2.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (18049), SecurityFocus (BID 11667†), OSVDB (11652†) and SecurityTracker (ID 1012181†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Heiko Stamer

Name

• Openskat

Version

• 2.0

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Openskat 2.1

Timelineinfo

11/10/2004 🔍
11/11/2004 +0 days 🔍
11/11/2004 +0 days 🔍
11/12/2004 +0 days 🔍
12/31/2004 +49 days 🔍
10/06/2007 +1009 days 🔍
03/10/2015 +2712 days 🔍
03/10/2015 +0 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2004-2721 (🔍)
GCVE (CVE): GCVE-0-2004-2721
GCVE (VulDB): GCVE-100-23588
X-Force: 18049 - openSkat VTMF weak encryption
SecurityFocus: 11667 - OpenSkat Weak Encryption Key Generation Vulnerability
OSVDB: 11652 - openSkat VTMF CheckGroup() Randomization Error Private Key Disclosure
SecurityTracker: 1012181

Entryinfo

Created: 03/10/2015 12:14
Changes: 03/10/2015 12:14 (63)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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