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    CVE-2023-51384

    In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.

    Published:Dec 18, 2023
    Last Modified:May 28, 2026
    EPS:Dec 18, 2023
    EPSS Score:0.00027
    CVSS Score:5.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Openbsd
    Product
    Openssh

    Exploits

    No exploit reference

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    References

    http://seclists.org/fulldisclosure/2024/Mar/21
    https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754b
    https://security.netapp.com/advisory/ntap-20240105-0005/
    https://support.apple.com/kb/HT214084
    https://www.debian.org/security/2023/dsa-5586
    https://www.openssh.com/txt/release-9.6
    https://www.openwall.com/lists/oss-security/2023/12/18/2
    http://seclists.org/fulldisclosure/2024/Mar/21
    https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754b
    https://security.netapp.com/advisory/ntap-20240105-0005/
    https://support.apple.com/kb/HT214084
    https://www.debian.org/security/2023/dsa-5586
    https://www.openssh.com/txt/release-9.6
    https://www.openwall.com/lists/oss-security/2023/12/18/2
    https://cert-portal.siemens.com/productcert/html/ssa-019113.html
    https://cert-portal.siemens.com/productcert/html/ssa-082556.html
    https://cert-portal.siemens.com/productcert/html/ssa-769027.html
    https://cert-portal.siemens.com/productcert/html/ssa-794697.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