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CVE-2021-36368

CVE-2021-36368

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed.

CVSS 3.7 · Low · EPSS 1.7% · Fix available

Published
Updated

Stack: system · network

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • openssh Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:8.9p1-1

    Update to 1:8.9p1-1

  • openssh Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:8.9p1-1

    Update to 1:8.9p1-1

  • openssh Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:8.9p1-1

    Update to 1:8.9p1-1

Original sources

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