jinja: Jinja improper neutralization of escape sequences (CVE-2024-56201) #shorts

Summary

In today's episode, we delve into CVE-2024-56201, a critical security vulnerability affecting Jinja, an extensible templating engine. This vulnerability allows attackers to execute arbitrary Python code by exploiting certain conditions in template management.

Product details

Jinja is a widely-used templating engine commonly integrated into various Python applications to facilitate dynamic content rendering. The affected versions fall within the 3.x branch and are earlier than 3.1.5.

Vulnerability type summary

The vulnerability is classified under CWE-150, which involves improper neutralization of escape, meta, or control sequences. This flaw permits the execution of arbitrary code when an attacker can influence both the template's filename and content.

Details of the vulnerability

This issue arises from a bug within the Jinja compiler. An attacker controlling the filename and contents of a template can execute python code regardless of Jinja's sandbox usage. This poses a significant risk, especially for applications prone to processing untrusted templates where the submitter chooses filenames. Remedial actions involve updating to at least version 3.1.5, which patches this vulnerability.

Conclusion

Security advisories from companies like SUSE and updates from Fedora underscore the severity of CVE-2024-56201. Developers using Jinja should immediately update to the latest secure version to safeguard their applications from potential exploitation.

This chain involves the following actors

This following systems are involved

Attack entry point

Remediation actions

Exploitation actions

• https://github.com/pallets/jinja/security/advisories/GHSA-gmj6-6f8f-6699
• https://github.com/pallets/jinja/issues/1792
• https://github.com/pallets/jinja/commit/767b23617628419ae3709ccfb02f9602ae9fe51f
• https://github.com/pallets/jinja/releases/tag/3.1.5