CVE-2023-46445 json
AsyncSSH Rogue Extension Negotiation
published 2023-11-09 2 y ago modified 2026-07-08 4 mo ago also GHSA-cfc2-wr2v-gxm5 , PYSEC-2023-237 , EUVD-2023-0045
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
An issue in AsyncSSH before 2.14.1 allows attackers to control the extension info message (RFC 8308) via a man-in-the-middle attack, aka a "Rogue Extension Negotiation."
Patch / fix
- pypi asyncssh 2.14.1
- asyncssh_project asyncssh 2.14.1
- python-asyncssh Debian 12 2.10.1-2+deb12u2
- python-asyncssh Debian 14, Debian 13 2.15.0-1
debian advisories DEBIAN-CVE-2023-46445
- python-asyncssh Ubuntu 20.04 LTS 1.12.2-1ubuntu0.2
- python-asyncssh Ubuntu 22.04 LTS 2.5.0-1ubuntu0.1
- python-asyncssh Ubuntu Pro 18.04 LTS 1.11.1-1ubuntu0.1~esm2
- python-asyncssh Ubuntu Pro 24.04 LTS 2.10.1-2ubuntu0.1+esm1
ubuntu advisories UBUNTU-CVE-2023-46445
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
- python-asyncssh openSUSE Tumbleweed 2.24.0-1.1
opensuse advisories openSUSE-SU-2026:11851-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2023-46445 updated cvss 5.9
python-asyncssh: Rogue Extension Negotiation
-
Red Hat Ceph Storage 6 python-asyncsshaffected: no fix planned “Will not fix”
-
Red Hat Ceph Storage 7 python-asyncsshaffected: no fix available
-
Red Hat Openshift Data Foundation 4 odf4/cephcsi-rhel9affected: no fix planned “Will not fix”
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| OSV | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | asyncssh | <2.14.1 |
2.14.1 |
Classification
References
-
github.com
/ronf/asyncssh/commit/83e43f5ea3470a8617fc388c72b062c7136efd7e
web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/ME34ROZWMDK5KLMZKTSA422XVJZ7IMTE/
vendor-advisory
-
github.com
/ronf/asyncssh/security/advisories/GHSA-cfc2-wr2v-gxm5
web, third-party-advisory, advisory
-
terrapin-attack.com
web
-
github.com
/ronf/asyncssh/blob/develop/docs/changes.rst
web
-
github.com
/advisories/GHSA-cfc2-wr2v-gxm5
advisory
-
packetstormsecurity.com
/files/176280/Terrapin-SSH-Connection-Weakening.html
web
- security.netapp.com /advisory/ntap-20231222-0001/
-
lists.debian.org
/debian-lts-announce/2024/09/msg00042.html
web
-
nvd.nist.gov
/vuln/detail/CVE-2023-46445
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/asyncssh/PYSEC-2023-237.yaml
web
-
github.com
/ronf/asyncssh
package
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/ME34ROZWMDK5KLMZKTSA422XVJZ7IMTE
web
-
security.netapp.com
/advisory/ntap-20231222-0001
web
Sources
- CVE List CVE-2023-46445
- GitHub Advisory GHSA-cfc2-wr2v-gxm5
- NVD CVE-2023-46445
- OSV PYSEC-2023-237
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.