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Information Disclosure due to Out-of-scope Site Resolution

Low severity GitHub Reviewed Published Jul 25, 2023 in TYPO3/typo3 • Updated Nov 5, 2023

Package

composer typo3/cms-core (Composer)

Affected versions

>= 9.4.0, < 9.5.42
>= 10.0.0, < 10.4.39
>= 11.0.0, < 11.5.30
>= 12.0.0, < 12.4.4

Patched versions

9.5.42
10.4.39
11.5.30
12.4.4

Description

CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C (3.5)

Problem

In multi-site scenarios, enumerating the HTTP query parameters id and L allowed out-of-scope access to rendered content in the website frontend. For instance, this allowed visitors to access content of an internal site by adding handcrafted query parameters to the URL of a site that was publicly available.

Solution

Update to TYPO3 versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30, 12.4.4 that fix the problem described above.

ℹ️ Strong security defaults - Manual actions required
Resolving sites by the id and L HTTP query parameters is now denied per default. However, it is still allowed to resolve a particular page by e.g. https://example.org/?id=123&L=0 - as long as the page-id 123 is in the scope of the site configured for the base-url example.org.
The new feature flag security.frontend.allowInsecureSiteResolutionByQueryParameters - which is disabled per default - can be used to reactivate the previous behavior.

Credits

Thanks to Garvin Hicking who reported this issue, and to TYPO3 core & security team members Oliver Hader and Benjamin Franzke who fixed the issue.

References

References

@ohader ohader published to TYPO3/typo3 Jul 25, 2023
Published to the GitHub Advisory Database Jul 25, 2023
Reviewed Jul 25, 2023
Published by the National Vulnerability Database Jul 25, 2023
Last updated Nov 5, 2023

Severity

Low

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
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
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:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.079%
(35th percentile)

Weaknesses

CVE ID

CVE-2023-38499

GHSA ID

GHSA-jq6g-4v5m-wm9r

Source code

Credits

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