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SilverStripe Subsite weakens file permissions

Moderate severity GitHub Reviewed Published Dec 19, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

composer silverstripe/subsites (Composer)

Affected versions

>= 2.0.0, < 2.6.1

Patched versions

2.6.1

Description

The subsites module can weaken edit restrictions on some files and allow a malicious user to edit files they do not have edit rights to.

This only affects projects with the subsites module installed. Regression testing should focus on custom file logic.

Be advised that this is not a case of a user being able to edit a file in subsites they do not have access to. As a reminder, all separation of content achieved with the subsites module should be viewed as cosmetic and not appropriate for security-critical applications.

References

Published to the GitHub Advisory Database Dec 19, 2022
Reviewed Dec 19, 2022
Published by the National Vulnerability Database Dec 21, 2022
Last updated Jan 27, 2023

Severity

Moderate

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
Low
Integrity
Low
Availability
None

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:L/I:L/A:N

EPSS score

0.079%
(35th percentile)

Weaknesses

CVE ID

CVE-2022-42949

GHSA ID

GHSA-cx45-565q-6qx8

Source code

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