CVE-2009-0642
MEDIUM · CVSS 6.8EPSS 2.6%EU EUVD
ext/openssl/ossl_ocsp.c in Ruby 1.8 and 1.9 does not properly check the return value from the OCSP_basic_verify function, which might allow remote attackers to successfully present an invalid X.509 certificate, possibly involving a revoked certificate.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-287
- EPSS score
- 2.6% (86th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-0645)
- Published
- February 20, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-0645 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- ruby-lang / ruby
- ruby-lang / ruby
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528
- http://redmine.ruby-lang.org/issues/show/1091(Exploit)
- http://secunia.com/advisories/33750
- http://secunia.com/advisories/35699
- http://secunia.com/advisories/35937
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:193
- http://www.redhat.com/support/errata/RHSA-2009-1140.html
- http://www.securityfocus.com/bid/33769
- http://www.securitytracker.com/id?1022505
- http://www.ubuntu.com/usn/USN-805-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/48761
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11450
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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