Entrouvert Lasso 1.9.9.0/2.0.0-1/2.2.1-0 DSA_verify input validation

CVSS Meta Temp Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Entrouvert Lasso 1.9.9.0/2.0.0-1/2.2.1-0. It has been declared as critical. The impacted element is the function DSA_verify. Such manipulation leads to input validation. This vulnerability is referenced as CVE-2009-0050. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Entrouvert Lasso 1.9.9.0/2.0.0-1/2.2.1-0. It has been rated as critical. Affected by this issue is the function DSA_verify. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is integrity. CVE summarizes:

Lasso 2.2.1 and earlier does not properly check the return value from the OpenSSL DSA_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

The bug was discovered 01/07/2009. The weakness was published 01/07/2009 (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is handled as CVE-2009-0050 since 01/07/2009. 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 vulnerability scanner Nessus provides a plugin with the ID 35334 (Debian DSA-1700-1 : lasso - incorrect API usage), 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175208 (Debian Security Update for Lasso (DSA-1700)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (47837), Tenable (35334), SecurityFocus (BID 33151†), OSVDB (51368†) and Vulnerability Center (SBV-20514†). Similar entries are available at VDB-45926, VDB-45925, VDB-45923 and VDB-45922. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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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

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 35334
Nessus Name: Debian DSA-1700-1 : lasso - incorrect API usage
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 63147
OpenVAS Name: Debian Security Advisory DSA 1700-1 (lasso)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

01/07/2009 🔍
01/07/2009 +0 days 🔍
01/07/2009 +0 days 🔍
01/07/2009 +0 days 🔍
01/07/2009 +0 days 🔍
01/07/2009 +0 days 🔍
01/11/2009 +4 days 🔍
01/12/2009 +1 days 🔍
01/18/2009 +6 days 🔍
03/17/2015 +2249 days 🔍
05/22/2025 +3719 days 🔍

Sourcesinfo

Advisory: xforce.iss.net
Status: Confirmed

CVE: CVE-2009-0050 (🔍)
GCVE (CVE): GCVE-0-2009-0050
GCVE (VulDB): GCVE-100-45800

OVAL: 🔍

X-Force: 47837
SecurityFocus: 33151 - Multiple Vendor OpenSSL 'DSA_verify' Function Signature Verification Vulnerability
OSVDB: 51368 - Multiple vendor OpenSSL DSA_verify() certificate chain validation security bypass
Vulnerability Center: 20514 - Lasso 2.2.1 and Earlier Remote Certificate Chain Validation Bypass, Medium

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 05/22/2025 20:34
Changes: 03/17/2015 16:11 (70), 08/23/2019 18:51 (8), 05/22/2025 20:34 (20)
Complete: 🔍
Cache ID: 216:02D:103

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