CVE-2022-23614 : Exploit Details and Defense Strategies

Twig, an open-source template language for PHP, is vulnerable to code injection due to improper enforcement of constraints in affected versions. Attackers could inject arbitrary PHP code via the

arrow

parameter of the

sort

filter. Users are advised to upgrade to patched versions to mitigate this vulnerability.

Understanding CVE-2022-23614

This CVE highlights a code injection vulnerability in Twig, impacting versions ranging from

>= 3.0.0, < 3.3.8

and

>= 2.0.0, < 2.14.11

.

What is CVE-2022-23614?

Twig, a popular PHP template language, fails to properly enforce constraints in its

sort

filter when in sandbox mode, allowing attackers to execute arbitrary PHP functions leading to code injection.

The Impact of CVE-2022-23614

The vulnerability poses a high severity risk with low complexity required for an attack. It can result in high confidentiality, integrity, and availability impacts on affected systems.

Technical Details of CVE-2022-23614

The following technical aspects are relevant to understand this CVE:

Vulnerability Description

This vulnerability arises from the improper enforcement of constraints in the

sort

filter's

arrow

parameter, enabling code injection of arbitrary PHP code.

Affected Systems and Versions

Twig versions

>= 3.0.0, < 3.3.8

and

>= 2.0.0, < 2.14.11

are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a non-Closure argument in the

arrow

parameter of the

sort

filter in Twig, bypassing security constraints.

Mitigation and Prevention

To address CVE-2022-23614, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade to patched versions of Twig that disallow calling non-Closure in the

sort

filter.

Long-Term Security Practices

Regularly monitor and apply security updates to avoid similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Twig and promptly apply recommended patches.