Improper Control of Generation of Code ('Code Injection') Affecting getgrav/grav package, versions <1.7.45
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Test your applications- Snyk ID SNYK-PHP-GETGRAVGRAV-6476869
- published 22 Mar 2024
- disclosed 21 Mar 2024
- credit as3617, juckchang
Introduced: 21 Mar 2024
CVE-2024-28119 Open this link in a new tabHow to fix?
Upgrade getgrav/grav to version 1.7.45 or higher.
Overview
getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS.
Affected versions of this package are vulnerable to Improper Control of Generation of Code ('Code Injection') due to the unrestricted access to twig extension class from grav context. An attacker can redefine the escape function and execute arbitrary commands. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance.
PoC
{{ var_dump(grav.twig.twig.extensions.core.setEscaper('system','twig_array_filter')) }}
{{ var_dump(['id'] | escape('system', 'system')) }}