CVE-2009-0050

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.

Published: 2009-01-07 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0050 is rated Low Risk (26.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-0050

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.36% 0.11% -0.26%
2 2023-03-07 1.14% 0.36% -0.77%
3 2022-02-04 — 1.14% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0050

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2009-0050

OS Trackers for CVE-2009-0050

vendor priority summary link
debian not yet assigned CVE-2009-0050 not yet assigned priority: Debian including 1 source packages (lasso), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0050
ubuntu medium CVE-2009-0050 medium priority: Ubuntu including 1 source packages (lasso), 5 status rows across 5 suites (dapper, gutsy, hardy, intrepid, upstream): released 5. https://ubuntu.com/security/CVE-2009-0050

Affected software / configurations for CVE-2009-0050

Vendor Product Version Raw CPE
entrouvert lasso <= 2.2.1-0 cpe:2.3:a:entrouvert:lasso:*:*:*:*:*:*:*:*
entrouvert lasso 1.9.9.0 cpe:2.3:a:entrouvert:lasso:1.9.9.0:*:*:*:*:*:*:*
entrouvert lasso 2.0.0-1 cpe:2.3:a:entrouvert:lasso:2.0.0-1:*:*:*:*:*:*:*

References for CVE-2009-0050

cvelogic Threat Intelligence