CVE-2020-1730
Publication date 9 April 2020
Last updated 25 August 2025
Ubuntu priority
Description
A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libssh | ||
| 18.04 LTS bionic |
Fixed 0.8.0~20170825.94fa1e38-1ubuntu0.6
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
5.3 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
Related Ubuntu Security Notices (USN)
- USN-4327-1
- libssh vulnerability
- 9 April 2020