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Authenticated remote code execution in October CMS

High severity GitHub Reviewed Published Feb 23, 2022 in octobercms/october • Updated Feb 3, 2023

Package

composer october/system (Composer)

Affected versions

< 1.0.474
>= 1.1.0, < 1.1.10
>= 2.0.0, < 2.1.27

Patched versions

1.0.474
1.1.10
2.1.27

Description

Impact

An authenticated user with the permissions to create, modify and delete website pages can exploit this vulnerability to bypass cms.safe_mode / cms.enableSafeMode in order to execute arbitrary code.

  • This issue only affects admin panels that rely on safe mode and restricted permissions.
  • To exploit this vulnerability, an attacker must first have access to the backend area.

Patches

The issue has been patched in Build 474 (v1.0.474) and v1.1.10.

Workarounds

Apply octobercms/library@c393c5c to your installation manually if unable to upgrade to Build 474 or v1.1.10.

References

Credits to:

  • David Miller

For more information

If you have any questions or comments about this advisory:

References

@daftspunk daftspunk published to octobercms/october Feb 23, 2022
Published by the National Vulnerability Database Feb 23, 2022
Published to the GitHub Advisory Database Feb 23, 2022
Reviewed Feb 23, 2022
Last updated Feb 3, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.522%
(78th percentile)

Weaknesses

CVE ID

CVE-2022-21705

GHSA ID

GHSA-79jw-2f46-wv22

Source code

Credits

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