Skip to content

October/System authenticated file write leads to remote code execution

High severity GitHub Reviewed Published Jan 14, 2022 in octobercms/october • Updated Jan 30, 2023

Package

composer october/system (Composer)

Affected versions

>= 1.1.0, < 1.1.6
< 1.0.473

Patched versions

1.1.6
1.0.473

Description

Impact

Assuming an attacker with "create, modify and delete website pages" privileges in the backend is able to execute PHP code by running specially crafted Twig code in the template markup.

Patches

Issue has been patched in Build 473 and v1.1.6

Workarounds

Apply octobercms/october@167b592 to your installation manually if you are unable to upgrade.

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 Jan 14, 2022
Published by the National Vulnerability Database Jan 14, 2022
Reviewed Jan 14, 2022
Published to the GitHub Advisory Database Jan 14, 2022
Last updated Jan 30, 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
Low
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:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.102%
(43rd percentile)

Weaknesses

CVE ID

CVE-2021-32649

GHSA ID

GHSA-wv23-pfj7-2mjj

Source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.