CVE-2021-31918

Local information disclosure via world-readable Ansible log

Published May 6, 2021 · Updated Aug 3, 2024

Information disclosure in tripleo-ansible as shipped in Red Hat OpenStack Platform 16.1 allows local users to read its Ansible deployment log. Stack creation and update place ansible.log on the undercloud with permissions that allow every local account to read data recorded by the playbook. Access requires a local account on the undercloud, and the published impact is limited to disclosure of log contents.

CVSS severity7.5
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in tripleo-ansible as shipped in Red Hat OpenStack Platform 16.1 allows local users to read its Ansible deployment log. Stack creation and update place ansible.log on the undercloud with permissions that allow every local account to read data recorded by the playbook. Access requires a local account on the undercloud, and the published impact is limited to disclosure of log contents.

The record

CVE
CVE-2021-31918
Published
May 6, 2021
Updated
Aug 3, 2024
Vendor
OpenStack
Product
tripleo-ansible
Classifications
CWE-200, CWE-732, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 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=As shipped in Red Hat Openstack 16.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenStack · tripleo-ansibleversion=As shipped in Red Hat Openstack 16.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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.

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

No observations available

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

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-732Incorrect Permission Assignment for Critical Resource
T1005Data from Local System

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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