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Arbitrary Code Execution in TYPO3 CMS

Critical severity GitHub Reviewed Published Jun 5, 2024 to the GitHub Advisory Database • Updated Jun 5, 2024

Package

composer typo3/cms (Composer)

Affected versions

>= 7.6.0, < 7.6.22
>= 8.0.0, < 8.7.5

Patched versions

7.6.22
8.7.5

Description

Due to a missing file extension in the fileDenyPattern, backend user are allowed to upload *.pht files which can be executed in certain web server setups. The new default fileDenyPattern is the following, which might have been overridden in the TYPO3 Install Tool.

\.(php[3-7]?|phpsh|phtml|pht)(\..*)?$|^\.htaccess$

References

Published to the GitHub Advisory Database Jun 5, 2024
Reviewed Jun 5, 2024
Last updated Jun 5, 2024

Severity

Critical

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
Changed
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:C/C:H/I:H/A:H

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-67wg-6j7r-mqh8

Source code

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