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    CVE-2020-14145

    The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.

    Published:Jun 29, 2020
    Last Modified:Dec 18, 2025
    EPS:Jun 29, 2020
    EPSS Score:0.01254
    CVSS Score:5.9

    Affected Products

    Vendor
    Netapp
    Product
    Active Iq Unified Manager
    Vendor
    Netapp
    Product
    Aff A700s
    Vendor
    Netapp
    Product
    Aff A700s Firmware
    Vendor
    Netapp
    Product
    Hci Compute Node
    Vendor
    Netapp
    Product
    Hci Management Node
    Vendor
    Netapp
    Product
    Hci Storage Node
    Vendor
    Netapp
    Product
    Ontap Select Deploy Administration Utility
    Vendor
    Netapp
    Product
    Solidfire
    Vendor
    Netapp
    Product
    Steelstore Cloud Integrated Storage
    Vendor
    Openbsd
    Product
    Openssh
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-203 Observable Discrepancy

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-189 Black Box Reverse Engineering

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    References

    http://www.openwall.com/lists/oss-security/2020/12/02/1
    https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
    https://docs.ssh-mitm.at/CVE-2020-14145.html
    https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
    https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
    https://security.gentoo.org/glsa/202105-35
    https://security.netapp.com/advisory/ntap-20200709-0004/
    https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/
    http://www.openwall.com/lists/oss-security/2020/12/02/1
    https://anongit.mindrot.org/openssh.git/commit/?id=b3855ff053f5078ec3d3c653cdaedefaa5fc362d
    https://docs.ssh-mitm.at/CVE-2020-14145.html
    https://github.com/openssh/openssh-portable/compare/V_8_3_P1...V_8_4_P1
    https://github.com/ssh-mitm/ssh-mitm/blob/master/ssh_proxy_server/plugins/session/cve202014145.py
    https://security.gentoo.org/glsa/202105-35
    https://security.netapp.com/advisory/ntap-20200709-0004/
    https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-2-ausnutzung-eines-informationslecks-fuer-gezielte-mitm-angriffe-auf-ssh-clients/

    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