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    CVE-2013-6420

    The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function.

    Published:Dec 10, 2013
    Last Modified:Apr 11, 2025
    EPS:Dec 17, 2013
    EPSS Score:0.28302
    CVSS Score:7.5

    Affected Products

    Vendor
    Apple
    Product
    Mac Os X
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Php
    Product
    Php
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Mission Critical
    Vendor
    Redhat
    Product
    Rhel Software Collections

    Exploits

    https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.htmlhttps://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.htmlhttps://www.exploit-db.com/exploits/30395

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    References

    http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21
    http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=c1224573c773b6845e83505f717fbf820fc18415
    http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
    http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
    http://rhn.redhat.com/errata/RHSA-2013-1813.html
    http://rhn.redhat.com/errata/RHSA-2013-1815.html
    http://rhn.redhat.com/errata/RHSA-2013-1824.html
    http://rhn.redhat.com/errata/RHSA-2013-1825.html
    http://rhn.redhat.com/errata/RHSA-2013-1826.html
    http://secunia.com/advisories/59652
    http://support.apple.com/kb/HT6150
    http://www.debian.org/security/2013/dsa-2816
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/64225
    http://www.securitytracker.com/id/1029472
    http://www.ubuntu.com/usn/USN-2055-1
    https://bugzilla.redhat.com/show_bug.cgi?id=1036830
    https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
    https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html
    http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21
    http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=c1224573c773b6845e83505f717fbf820fc18415
    http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
    http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
    http://rhn.redhat.com/errata/RHSA-2013-1813.html
    http://rhn.redhat.com/errata/RHSA-2013-1815.html
    http://rhn.redhat.com/errata/RHSA-2013-1824.html
    http://rhn.redhat.com/errata/RHSA-2013-1825.html
    http://rhn.redhat.com/errata/RHSA-2013-1826.html
    http://secunia.com/advisories/59652
    http://support.apple.com/kb/HT6150
    http://www.debian.org/security/2013/dsa-2816
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/64225
    http://www.securitytracker.com/id/1029472
    http://www.ubuntu.com/usn/USN-2055-1
    https://bugzilla.redhat.com/show_bug.cgi?id=1036830
    https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
    https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html

    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