CVE-2018-7749 json
AsyncSSH SSH Server Authentication Bypass
published 2018-03-12 8 y ago modified 2026-06-17 4 mo ago also GHSA-97cv-6pjf-5f9q , PYSEC-2018-108 , EUVD-2018-0022
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi asyncssh 1.12.1
- asyncssh_project asyncssh 1.12.1
- python-asyncssh Debian 14, Debian 13, Debian 12 1.12.1-1
debian advisories DEBIAN-CVE-2018-7749
- python-asyncssh Ubuntu Pro 18.04 LTS 1.11.1-1ubuntu0.1~esm1
ubuntu advisories UBUNTU-CVE-2018-7749
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | asyncssh | <1.12.1 |
1.12.1 |
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4
web, third-party-advisory, patch
-
github.com
/ronf/asyncssh/commit/16e6ebfa893167c7d9d3f6dc7a2c0d197e47f43a
web
-
groups.google.com
/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ
mailing-list
-
nvd.nist.gov
/vuln/detail/CVE-2018-7749
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/asyncssh/PYSEC-2018-108.yaml
web
-
github.com
/ronf/asyncssh
package
-
groups.google.com
/forum/#!msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ
web
-
github.com
/advisories/GHSA-97cv-6pjf-5f9q
advisory
Sources
- CVE List CVE-2018-7749
- GitHub Advisory GHSA-97cv-6pjf-5f9q
- NVD CVE-2018-7749
- OSV PYSEC-2018-108
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.