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    CVE-2020-11501

    GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.

    Published:Mar 27, 2020
    Last Modified:Nov 21, 2024
    EPS:Apr 3, 2020
    EPSS Score:0.10372
    CVSS Score:7.4

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Gnu
    Product
    Gnutls
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

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    References

    http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html
    https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2
    https://gitlab.com/gnutls/gnutls/-/issues/960
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
    https://security.gentoo.org/glsa/202004-06
    https://security.netapp.com/advisory/ntap-20200416-0002/
    https://usn.ubuntu.com/4322-1/
    https://www.debian.org/security/2020/dsa-4652
    https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31
    http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html
    https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2
    https://gitlab.com/gnutls/gnutls/-/issues/960
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
    https://security.gentoo.org/glsa/202004-06
    https://security.netapp.com/advisory/ntap-20200416-0002/
    https://usn.ubuntu.com/4322-1/
    https://www.debian.org/security/2020/dsa-4652
    https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31

    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