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    CVE-2009-0642

    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.

    Published:Jan 29, 2009
    Last Modified:Apr 23, 2026
    EPS:Feb 18, 2009
    EPSS Score:0.00974
    CVSS Score:6.8

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Ruby-lang
    Product
    Ruby

    Exploits

    http://redmine.ruby-lang.org/issues/show/1091http://redmine.ruby-lang.org/issues/show/1091

    Common Weakness Enumeration

    CWE-287 Improper Authentication

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    References

    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528
    http://redmine.ruby-lang.org/issues/show/1091
    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
    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513528
    http://redmine.ruby-lang.org/issues/show/1091
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High