CVE-2021-3469Network attack vector

Authenticated proxy impersonation via unchecked SAN signing

Published Jun 3, 2021 · Updated Aug 3, 2024

Incorrect authorization in Foreman before 2.3.4 and before 2.4.0 allows remote authenticated users to impersonate its Smart Proxy. When SAN authorization extensions are enabled, the Puppet CA signs authenticated requests containing attacker-chosen SANs without verifying that those names belong to the requester. The path requires Puppet CA integration and the non-default allow-authorization-extensions setting, after which the issued certificate is trusted as the proxy.

CVSS severity5.4
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Foreman before 2.3.4 and before 2.4.0 allows remote authenticated users to impersonate its Smart Proxy. When SAN authorization extensions are enabled, the Puppet CA signs authenticated requests containing attacker-chosen SANs without verifying that those names belong to the requester. The path requires Puppet CA integration and the non-default allow-authorization-extensions setting, after which the issued certificate is trusted as the proxy.

The record

CVE
CVE-2021-3469
Published
Jun 3, 2021
Updated
Aug 3, 2024
Vendor
The Foreman Project
Product
Foreman
Classifications
CWE-863, T1649
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=foreman 2.3.4, foreman 2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Foreman Project · Foremanversion=foreman 2.3.4, foreman 2.4.0

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1649Steal or Forge Authentication Certificates

Public exploit references

No public exploit references are available in this record.

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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