CTFd 3.7.3 String __init__.py validate_email redos

Summaryinfo

A vulnerability categorized as problematic has been discovered in CTFd 3.7.3. Affected is the function validate_email of the file CTFd/utils/validators/__init__.py of the component String Handler. Such manipulation leads to redos. This vulnerability is traded as CVE-2024-46242. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in CTFd 3.7.3. It has been rated as problematic. Affected by this issue is the function validate_email of the file CTFd/utils/validators/__init__.py of the component String Handler. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

An issue in the validate_email function in CTFd/utils/validators/__init__.py of CTFd 3.7.3 allows attackers to cause a Regular expression Denial of Service (ReDoS) via supplying a crafted string as e-mail address during registration.

This vulnerability is handled as CVE-2024-46242 since 09/11/2024. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1449.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• CTFd

Version

• 3.7.3

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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