SB2021031581 - Ubuntu update for python-asyncssh
Published: March 15, 2021 Updated: October 31, 2026
Security Bulletin ID
SB2021031581
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2018-7749)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the application does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step and gain unauthorized access to the system.
Remediation
Install update from vendor's website.