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    CVE-2019-19269

    An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.

    Published:Nov 26, 2019
    Last Modified:Nov 21, 2024
    EPS:Nov 26, 2019
    EPSS Score:0.00716
    CVSS Score:4.9

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Proftpd
    Product
    Proftpd

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
    https://github.com/proftpd/proftpd/issues/861
    https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/
    https://security.gentoo.org/glsa/202003-35
    https://www.oracle.com/security-alerts/cpuapr2020.html
    http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
    https://github.com/proftpd/proftpd/issues/861
    https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/
    https://security.gentoo.org/glsa/202003-35
    https://www.oracle.com/security-alerts/cpuapr2020.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