CVE-2021-36369
CVSS V2 None
CVSS V3 High 7.5
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.
Overview
- CVE ID
- CVE-2021-36369
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2022-10-12T21:15:09
- Last Modified Date
- 2023-01-20T13:31:40
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:* | 1 | OR | 2020.81 |
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/mkj/dropbear/pull/128 | Third Party Advisory |
| https://github.com/mkj/dropbear/releases | Release Notes Third Party Advisory |
| https://github.com/mkj/dropbear/releases/tag/DROPBEAR_2022.82 | Release Notes Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00015.html |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-36369 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36369 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-10-12 22:00:22 | Added to TrackCVE | |||
| 2022-12-07 06:56:30 | 2022-10-12T21:15Z | 2022-10-12T21:15:09 | CVE Published Date | updated |
| 2022-12-07 06:56:30 | 2022-11-14T15:15:14 | CVE Modified Date | updated | |
| 2022-12-07 06:56:30 | Undergoing Analysis | Vulnerability Status | updated | |
| 2022-12-07 06:56:41 | References | updated | ||
| 2023-01-20 14:12:59 | 2023-01-20T13:31:40 | CVE Modified Date | updated | |
| 2023-01-20 14:12:59 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |