CVE-2021-36369
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Dropbear Ssh
PublishedOct 12, 2022
First seenOct 12, 2022
Weakness typeCWE-287Improper authentication
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dropbear_ssh_project dropbear_ssh | v ≤ 2020.81 | — |
| debian debian_linux | 10.0 | — |
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