CVE-2018-7749 AsyncSSH SSH Server Authentication Bypass
Attackers can bypass authentication in AsyncSSH by skipping the authentication step, allowing unauthorized access to the SSH server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-7749?
CVE-2018-7749 is a critical authentication bypass vulnerability in n/a, published on 12 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step.
Weakness: CWE-287
Which versions are affected by CVE-2018-7749?
3 open source packages ship an affected version, including asyncssh and AsyncSSH. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
asyncssh PyPI | All versions | 1.12.1 |
asyncssh PyPI | All versions | 1.12.1 |
AsyncSSH PyPI | All versions | 1.12.1 |
Products include Asyncssh Project Asyncssh.
How do I fix CVE-2018-7749?
Upgrade asyncssh to 1.12.1 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2018-7749 being exploited?
There is no known exploitation of CVE-2018-7749 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-7749, GHSA-97cv-6pjf-5f9q, PYSEC-2018-108, UBUNTU-CVE-2018-7749, USN-4854-1.