CVE-2021-36368

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Summary

CVECVE-2021-36368
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-03-13 00:15:00 UTC
Updated2023-11-07 03:36:00 UTC
Description** DISPUTED ** 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."

Risk And Classification

Problem Types: CWE-287

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Application Openbsd Openssh All All All All

References

ReferenceSourceLinkTags
CVE-2021-36368 - added option to disable trivial auth methods by manfred-kaiser · Pull Request #258 · openssh/openssh-portable · GitHub MISC github.com
CVE-2021-36368 MISC security-tracker.debian.org
3316 – possible bypass of fido 2 devices and ssh-askpass CONFIRM bugzilla.mindrot.org
OpenSSH: Security MISC www.openssh.com
SSH-MITM Docs - Trivial Authentication MISC docs.ssh-mitm.at
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 183825 Debian Security Update for openssh (CVE-2021-36368)
  • 38900 OpenSSH Public-Key Authentication Vulnerability
  • 671904 EulerOS Security Update for openssh (EulerOS-SA-2022-1976)
  • 671948 EulerOS Security Update for openssh (EulerOS-SA-2022-2006)
  • 671973 EulerOS Security Update for openssh (EulerOS-SA-2022-2167)
  • 672011 EulerOS Security Update for openssh (EulerOS-SA-2022-2142)
  • 900760 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (9042)
  • 900947 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (9045)
  • 904378 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (9042-1)
  • 907199 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (9045-1)
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