CVE-2019-19755Public exploitNetwork attack vector

Server impersonation via image-baked SSH host keys

Published Apr 30, 2024 · Updated Oct 25, 2024

Improper key generation in ethOS 1.3.3 and earlier allows remote attackers to impersonate SSH servers and identify exposed hosts. The installation image contains SSH host keys generated before imaging, so separate deployments present the same server identity instead of unique keys. An attacker who extracts the shared key and can intercept SSH traffic can impersonate a rig, while internet observers can fingerprint public IPv4 instances by the repeated public key.

CVSS severity9.1
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper key generation in ethOS 1.3.3 and earlier allows remote attackers to impersonate SSH servers and identify exposed hosts. The installation image contains SSH host keys generated before imaging, so separate deployments present the same server identity instead of unique keys. An attacker who extracts the shared key and can intercept SSH traffic can impersonate a rig, while internet observers can fingerprint public IPv4 instances by the repeated public key.

The record

CVE
CVE-2019-19755
Published
Apr 30, 2024
Updated
Oct 25, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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