CVE-2019-18906Network attack vector

Authentication bypass via reusable password hashes

Published Jun 30, 2021 · Updated Sep 16, 2024

Improper authentication in cryptctl before 2.4 allows remote attackers with a captured password hash to access key-server operations. The client hashes the administrative password, and the RPC server accepts that hash directly as the authentication secret, making a captured digest reusable without cracking. Possession of the hash is required; successful replay grants the protected encryption-key management access associated with the password.

CVSS severity9.8
Critical
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in cryptctl before 2.4 allows remote attackers with a captured password hash to access key-server operations. The client hashes the administrative password, and the RPC server accepts that hash directly as the authentication secret, making a captured digest reusable without cracking. Possession of the hash is required; successful replay grants the protected encryption-key management access associated with the password.

The record

CVE
CVE-2019-18906
Published
Jun 30, 2021
Updated
Sep 16, 2024
Vendor
NeuVector
Product
SUSE Linux Enterprise Server for SAP Applications
Classifications
CWE-287, T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=cryptctl <2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NeuVector · SUSE Linux Enterprise Server for SAP Applicationsversion=cryptctl <2.4
NeuVector · SUSE Manager Serverversion=cryptctl <2.4

Published CVSS scores

9.8SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1550Use Alternate Authentication Material

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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