U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-36368 Detail

Disputed     

Current Description

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.


View Analysis Description

Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
https://bugzilla.mindrot.org/show_bug.cgi?id=3316 Issue Tracking  Third Party Advisory 
https://bugzilla.mindrot.org/show_bug.cgi?id=3316 Issue Tracking  Third Party Advisory 
https://docs.ssh-mitm.at/trivialauth.html Third Party Advisory 
https://docs.ssh-mitm.at/trivialauth.html Third Party Advisory 
https://github.com/openssh/openssh-portable/pull/258 Patch  Third Party Advisory 
https://github.com/openssh/openssh-portable/pull/258 Patch  Third Party Advisory 
https://security-tracker.debian.org/tracker/CVE-2021-36368 Third Party Advisory 
https://security-tracker.debian.org/tracker/CVE-2021-36368 Third Party Advisory 
https://www.openssh.com/security.html Vendor Advisory 
https://www.openssh.com/security.html Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-287 Improper Authentication cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-36368
NVD Published Date:
03/12/2022
NVD Last Modified:
11/21/2024
Source:
MITRE