CVE-2018-7749: AsyncSSH SSH Server Authentication Bypass

CVE-2018-7749 · Severity: low · CVSS 3.1 · Published 2018-03-12

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.

Technologies: asyncssh (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2018-7749 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2018-7749 being exploited in the wild.
How severe is CVE-2018-7749?
Low severity, with a CVSS score of 3.1, published 12 March 2018.
Which products and versions are affected?
asyncssh (PyPI) ECOSYSTEM:introduced=0,fixed=1.12.1, GIT:introduced=0,fixed=c161e26cdc0d41b745b63d9f17b437f073bf7ba4|ECOSYSTEM:introduced=0,fixed=1.12.1.
Is there a fix for CVE-2018-7749?
Yes. asyncssh (PyPI): upgrade to 1.12.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2018-7749?
Check whether you run asyncssh (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • asyncssh (PyPI): upgrade to 1.12.1 or later
    pip install "asyncssh>=1.12.1"

Affected products

  • asyncssh (PyPI) ECOSYSTEM:introduced=0,fixed=1.12.1, GIT:introduced=0,fixed=c161e26cdc0d41b745b63d9f17b437f073bf7ba4|ECOSYSTEM:introduced=0,fixed=1.12.1

Identifiers

  • CVE-2018-7749
  • GHSA-97cv-6pjf-5f9q
  • PYSEC-2018-108

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