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GHSA-6j75-5wfj-gh66
No affected components available
Description
Under some circumstances, the sandbox security checks are not run which allows user-contributed templates to bypass the sandbox restrictions.
The security issue happens when all these conditions are met:
- The sandbox is disabled globally;
- The sandbox is enabled via a sandboxed
include()function which references a template name (likeincluded.twig) and not aTemplateorTemplateWrapperinstance; - The included template has been loaded before the
include()call but in a non-sandbox context (possible as the sandbox has been globally disabled).
Resolution
The patch ensures that the sandbox security checks are always run at runtime.
Credits
We would like to thank Fabien Potencier for reporting and fixing the issue.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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