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
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.015 (73.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Finkproject Libnasl — versions 2.2.11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html (vendor-advisory)
- www.attrition.org/pipermail/vim/2009-January/002133.html (mailing-list)
- bugs.debian.org/cgi-bin/bugreport.cgi (Exploit)
- openwall.com/lists/oss-security/2009/01/12/4 (mailing-list)
- bugzilla.redhat.com/show_bug.cgi (Exploit)
- cvs.fedoraproject.org/viewvc/rpms/libnasl/F-10/libnasl.spec
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.