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CVE-2023-46445

20
FAUCET Score

CVE-2023-46445 describes a "Rogue Extension Negotiation" vulnerability in AsyncSSH versions prior to 2.14.1, allowing attackers to control extension info messages through a man-in-the-middle (MITM) attack. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high impact on integrity, but requires high attack complexity. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage, indicating awareness of the issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.14.1CPE matchmatch criteria
cpe:2.3:a:asyncssh_project:asyncssh:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 7th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

pippatch availablevia ghsa
Product: asyncsshFixed in: 2.14.1
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 7Fixed in: python-asyncssh
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 6Fixed in: python-asyncssh
redhatend of lifevia redhat_api
Product: Red Hat Openshift Data Foundation 4Fixed in: odf4/cephcsi-rhel9

Vendor Advisories (2)

redhatCVE-2023-46445Moderate

python-asyncssh: Rogue Extension Negotiation

Nov 13, 2023
pipGHSA-cfc2-wr2v-gxm5medium

AsyncSSH Rogue Extension Negotiation

Nov 9, 2023

References

lists.debian.org / debian-lts-announce/2024/09/msg00042.html
packetstormsecurity.com / files/176280/Terrapin-SSH-Connection-Weakening.html
github.com / advisories/GHSA-cfc2-wr2v-gxm5
github.com / ronf/asyncssh/blob/develop/docs/changes.rst
github.com / ronf/asyncssh/security/advisories/GHSA-cfc2-wr2v-gxm5
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ME34ROZWMDK5KLMZKTSA422XVJZ7IMTE
security.netapp.com / advisory/ntap-20231222-0001
terrapin-attack.com