CVE-2024-24754: bref — Exploit & Fix

Description

Bref enable serverless PHP on AWS Lambda. When Bref is used with the Event-Driven Function runtime and the handler is a `RequestHandlerInterface`, then the Lambda event is converted to a PSR7 object. During the conversion process, if the request is a MultiPart, each part is parsed and its content added in the `$files` or `$parsedBody` arrays. The conversion process produces a different output compared to the one of plain PHP when keys ending with and open square bracket ([) are used. Based on the application logic the difference in the body parsing might lead to vulnerabilities and/or undefined behaviors. This vulnerability is patched in 2.1.13.

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CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-436 CWE-436

Affected Products

Vendor	Product	Versions
mnapoli	bref	< 2.1.13

References

Advisories & Patches

https://github.com/brefphp/bref/commit/c77d9f5abf021f29fa96b5720b7b84adbd199092 https://github.com/brefphp/bref/security/advisories/GHSA-82vx-mm6r-gg8w https://github.com/brefphp/bref/commit/c77d9f5abf021f29fa96b5720b7b84adbd199092 https://github.com/brefphp/bref/security/advisories/GHSA-82vx-mm6r-gg8w

Exploits

https://github.com/brefphp/bref/security/advisories/GHSA-82vx-mm6r-gg8w https://github.com/brefphp/bref/security/advisories/GHSA-82vx-mm6r-gg8w

Frequently Asked Questions

What is CVE-2024-24754? +

Bref enable serverless PHP on AWS Lambda. When Bref is used with the Event-Driven Function runtime and the handler is a `RequestHandlerInterface`, then the Lambda event is converted to a PSR7 object. During the conversion process, if the request is a MultiPart, each part is parsed and its content added in the `$files` or `$parsedBody` arrays. The conversion process produces a different output compared to the one of plain PHP when keys ending with and open square bracket ([) are used. Based on the application logic the difference in the body parsing might lead to vulnerabilities and/or undefined behaviors. This vulnerability is patched in 2.1.13. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2024-24754? +

CVE-2024-24754 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2024-24754? +

CVE-2024-24754 affects products from mnapoli, specifically: bref. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-24754? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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