CVE-2021-36369 - CVE House
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Status published Unknown CVE-2021-36369

An issue was discovered in Dropbear through 2020.81. Due to...

Vulnerability Description

An issue was discovered in Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH code, it is possible for an SSH server to change the login process in its favor. This attack can bypass additional security measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker to abuse a forwarded agent for logging on to another server unnoticed.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

dropbear ssh project

View all reports →

Affected Software

dropbear ssh, debian linux
Vulnerable Versions:
0, 10.0

Timeline

Official Publish: October 12th, 2022
Last Modified: May 15th, 2025
Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.