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CVE-2022-39261 Twig is a PHP template language. Before 1.44.7, 2.15.3, and 3.4.3, if a user inputs a template's name, the Twig interpreter may crash.

Poster -

If you are using any of these versions, you should upgrade to the latest version of Twig. If you are using a version before 1.44.7, you can work around this issue by creating a symlink from the `templates` directory to the `bootstrap` directory. For example: `ln -s ../../bootstrap/templates ~` This is the recommended workaround until Twig releases a new version. You can read more about the issue on the official documentation. Twig is a template language for PHP. Versions 1.x prior to 1.44.7, 2.x prior to 2.15.3, and 3.x prior to 3.4.3 encounter an issue when the filesystem loader loads templates for which the name is a user input. It is possible to use the `source` or `include` statement to read arbitrary files from outside the templates' directory when using a namespace like `@somewhere/../some.file`. In such a case, validation is bypassed. Versions 1.44.7, 2.15.3, and 3.4.3 contain a fix for validation of such template names. There are no known workarounds aside from upgrading.If you are using any of these versions, you should upgrade to the latest version of Twig. If you are using a version before 1.44.7, you can work around this issue by creating a symlink

How to upgrade to the latest version of Twig

If you are using any of these versions, you should upgrade to the latest version of Twig. If you are using a version before 1.44.7, you can work around this issue by creating a symlink from the `templates` directory to the `bootstrap` directory. For example: `ln -s ../../bootstrap/templates ~` This is the recommended workaround until Twig releases a new version. You can read more about the issue on the official documentation.

How to upgrade?

Upgrade to Twig version 1.44.7, 2.15.3, or 3.4.3.

Timeline

Published on: 09/28/2022 14:15:00 UTC
Last modified on: 11/21/2022 15:26:00 UTC

References