CVE Vulnerability

CVE-2021-36369

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.

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/mkj/dropbear/pull/128 Third Party Advisory
https://github.com/mkj/dropbear/releases/tag/DROPBEAR_2022.82 Release Notes Third Party Advisory
https://github.com/mkj/dropbear/releases Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00015.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Information

Published : 2022-10-12 09:15

Updated : 2023-01-20 01:31

NVD link : CVE-2021-36369

Mitre link : CVE-2021-36369

Products Affected
No products.
CWE
CWE-287