CVE-2018-7750
Publication date 13 March 2018
Last updated 24 July 2024
Ubuntu priority
transport.py in the SSH server implementation of Paramiko before 1.17.6, 1.18.x before 1.18.5, 2.0.x before 2.0.8, 2.1.x before 2.1.5, 2.2.x before 2.2.3, 2.3.x before 2.3.2, and 2.4.x before 2.4.1 does not properly check whether authentication is completed before processing other requests, as demonstrated by channel-open. A customized SSH client can simply skip the authentication step.
From the Ubuntu Security Team
Matthijs Kooijman discovered that Paramiko's SSH server implementation did not properly require authentication before processing requests. An unauthenticated remote attacker could possibly use this to execute arbitrary code.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| paramiko | ||
| 16.04 LTS xenial |
Fixed 1.16.0-1ubuntu0.1
|
|
| 14.04 LTS trusty |
Fixed 1.10.1-1git1ubuntu0.1
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.8 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3603-2
- Paramiko vulnerability
- 20 March 2018
- USN-3603-1
- Paramiko vulnerability
- 20 March 2018