CVE-2009-0125
CVE-2009-0125 is a medium-severity vulnerability in Finkproject Libnasl with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 1% (71st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Finkproject Libnasl
- Published:
- Last modified:
Description
NOTE: this issue has been disputed by the upstream vendor. nasl/nasl_crypto2.c in the Nessus Attack Scripting Language library (aka libnasl) 2.2.11 does not properly check the return value from the OpenSSL DSA_do_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. NOTE: the upstream vendor has disputed this issue, stating "while we do misuse this function (this is a bug), it has absolutely no security ramification.
Frequently asked questions
- What is CVE-2009-0125?
- NOTE: this issue has been disputed by the upstream vendor. nasl/nasl_crypto2.c in the Nessus Attack Scripting Language library (aka libnasl) 2.2.11 does not properly check the return value from the OpenSSL DSA_do_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. NOTE: the upstream vendor has disputed this issue, stating "while we do misuse this function (this is a bug), it has absolutely no security ramification.
- How severe is CVE-2009-0125?
- CVE-2009-0125 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2009-0125 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-0125?
- CVE-2009-0125 affects Finkproject Libnasl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2009-0125?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2009-0125 published?
- CVE-2009-0125 was published on 2009-01-15 and last updated on 2026-06-16.
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511517
- http://cvs.fedoraproject.org/viewvc/rpms/libnasl/F-10/libnasl.spec?r1=1.16&r2=1.17
- http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html
- http://openwall.com/lists/oss-security/2009/01/12/4
- http://www.attrition.org/pipermail/vim/2009-January/002133.html
- https://bugzilla.redhat.com/show_bug.cgi?id=479655
Affected products (1)
- cpe:2.3:a:finkproject:libnasl:2.2.11:*:*:*:*:*:*:*
Other CWE-287 (Improper Authentication) vulnerabilities
- CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
- CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
- CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
- CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
Browse all CWE-287 (Improper Authentication) vulnerabilities →