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GHSA-4g52-pq8j-6qv5high7.5

TYPO3 Extension Manager Module vulnerable to Cross-Site Request Forgery

Impact

A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method.

Source excerpt · OSV
Applies when

Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions:

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

typo3/cms-extensionmanager Packagist
Affected rangeRecorded fix
From 10.0.0 before 10.4.48Ecosystem versions10.4.48
From 11.0.0 before 11.5.42Ecosystem versions11.5.42
From 12.0.0 before 12.4.25Ecosystem versions12.4.25
From 13.0.0 before 13.4.3Ecosystem versions13.4.3

Version evidence: OSV · GHSA-4g52-pq8j-6qv5

View original version evidence (136 explicit versions)

Original source description

Problem

A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method.

Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions:

  • the user opens a malicious link, such as one sent via email.
  • the user visits a compromised or manipulated website while the following settings are misconfigured:
    • security.backend.enforceReferrer feature is disabled,
    • BE/cookieSameSite configuration is set to lax or none

The vulnerability in the affected downstream component “Extension Manager Module” allows attackers to retrieve and install 3rd party extensions from the TYPO3 Extension Repository - which can lead to remote code execution in the worst case.

Solution

Update to TYPO3 versions 11.5.42 ELTS, 12.4.25 LTS, 13.4.3 LTS that fix the problem described.

Credits

Thanks to TYPO3 core and security members Benjamin Franzke, Oliver Hader, Andreas Kienast, Torben Hansen, Elias Häußler who fixed the issue.

References

References