CVE-2025-6224Public exploitNetwork attack vector

Private-key disclosure via malformed SubjectKeyId

Published Jul 1, 2025 · Updated Jul 1, 2025

Cleartext key storage in Canonical Juju Utils 4.0.1 through 4.0.3 allows attackers to extract a private key from a certificate. cert.NewLeaf passes the Ed25519 private key as the prefix argument to sha512.New384().Sum, so SubjectKeyId contains the key followed by an empty-input digest. Exposure requires a generated client or server certificate to cross the network; a server TLS handshake can disclose its key, while a client must connect to an attacker-controlled server.

CVSS severity6.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext key storage in Canonical Juju Utils 4.0.1 through 4.0.3 allows attackers to extract a private key from a certificate. cert.NewLeaf passes the Ed25519 private key as the prefix argument to sha512.New384().Sum, so SubjectKeyId contains the key followed by an empty-input digest. Exposure requires a generated client or server certificate to cross the network; a server TLS handshake can disclose its key, while a client must connect to an attacker-controlled server.

The record

CVE
CVE-2025-6224
Published
Jul 1, 2025
Updated
Jul 1, 2025
Vendor
Canonical
Product
Juju Utils
Classifications
CWE-312, CAPEC-131, T1552.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2025Record 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=4.0.1 <=4.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Canonical · Juju Utilsversion=4.0.1 <=4.0.3

Published CVSS scores

6.5CanonicalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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-312Cleartext Storage of Sensitive Information
CAPEC-131Resource Leak Exposure
T1552.004Unsecured Credentials Private Keys

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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