CVE-2024-34069: Code Execution vulnerability in werkzeug (PyPI)

What is CVE-2024-34069 About?

This vulnerability in Werkzeug's debugger allows for unauthorized code execution on a developer's machine under specific circumstances. Its impact is severe, enabling a remote attacker to gain control over the developer's environment. Exploitation is complex, requiring a unique combination of user interaction, domain control, and URL guessing.

Affected Software

werkzeug <3.0.3

Technical Details

The vulnerability in the Werkzeug debugger allows for remote code execution. It requires a multi-step attack chain: 1. An attacker must trick a developer into interacting with a domain and subdomain controlled by the attacker. This often involves social engineering or DNS manipulation. 2. The developer must then interact with an application running Werkzeug's debugger and enter the debugger's PIN, which might be exposed or guessed. 3. The attacker needs to guess a specific URL within the developer's application that will trigger the debugger. Once these prerequisites are met, the attacker may be able to leverage the open debugger session to execute arbitrary code on the developer's machine, even if the debugger is nominally running only on localhost. This indicates that the debugger's session or PIN validation mechanism can be bypassed or coerced under these specific conditions.

What is the Impact of CVE-2024-34069?

Successful exploitation may allow attackers to execute arbitrary code with the privileges of the developer's account, leading to full system compromise, data theft, or further network penetration.

What is the Exploitability of CVE-2024-34069?

Exploitation is of high complexity due to several stringent prerequisites and attacker actions. It requires strong user interaction: the developer must be lured to an attacker-controlled domain/subdomain and manually enter the debugger PIN. No direct authentication is required for the debugger vulnerability itself, but the developer's authentication to the machine or application is assumed, and the attacker is effectively bypassing or exploiting the trust relationship. The attack is remote, initiated by the attacker but requires local developer action. Special conditions include the developer having the debugger enabled (even if bound to localhost), and the attacker successfully guessing a debugger-triggering URL. Risk factors that increase exploitation likelihood include developers having easily guessable debugger PINs, developers being susceptible to social engineering, and a lack of strict network segregation to prevent communication between compromised domains and developer machines.

What are the Known Public Exploits?

PoC Author	Link	Commentary
No known exploits

What are the Available Fixes for CVE-2024-34069?

A Fix by Resolved Security Exists!

Fix open-source vulnerabilities without upgrading your dependencies.

About the Fix from Resolved Security

This patch introduces host-based validation for access to the interactive debugger by only allowing trusted hosts (by default, localhost domains and 127.0.0.1) to execute sensitive actions. This prevents remote attackers from exploiting the debugger over untrusted networks, which directly addresses CVE-2024-34069 by mitigating the risk of remote code execution or unauthorized access via exposed debug interfaces.

Available Upgrade Options

werkzeug
- <3.0.3 → Upgrade to 3.0.3

Struggling with dependency upgrades?

See how Resolved Security's drop-in replacements make it simple.

Book a demo

Additional Resources

What are Similar Vulnerabilities to CVE-2024-34069?

Similar Vulnerabilities: CVE-2020-28045 , CVE-2016-10738 , CVE-2015-8557 , CVE-2019-10060 , CVE-2017-1000100

CVE-2024-34069 Code Execution vulnerability in werkzeug (PyPI)