Auth bypass in Finkproject Libnasl
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.
Vulnerability class: Broken Authentication
EPSS: 0.015 (71.5th percentile) — read the EPSS interpretation.
Affected products
- Finkproject Libnasl — versions 2.2.11
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (vendor-advisory, x_refsource_SUSE)
- cve@mitre.org (mailing-list, x_refsource_VIM)
- cve@mitre.org (Exploit, x_refsource_MISC)
- cve@mitre.org (mailing-list, x_refsource_MLIST)
- cve@mitre.org (x_refsource_CONFIRM, Exploit)
- cve@mitre.org (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2009-0125?
- CVE-2009-0125 is a vulnerability in Finkproject Libnasl, classified under Improper Authentication. Published 2009-01-15.
- Is CVE-2009-0125 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.