Improper Control of Generation of Code ('Code Injection') Affecting getgrav/grav package, versions <1.7.45


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-PHP-GETGRAVGRAV-6476869
  • published22 Mar 2024
  • disclosed21 Mar 2024
  • creditas3617, juckchang

Introduced: 21 Mar 2024

CVE-2024-28119  (opens in a new tab)
CWE-94  (opens in a new tab)

How 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')) }}

CVSS Scores

version 3.1