CVE-2024-24753: bref — Exploit & Fix

Description

Bref enable serverless PHP on AWS Lambda. When Bref is used in combination with an API Gateway with the v2 format, it does not handle multiple values headers. If PHP generates a response with two headers having the same key but different values only the latest one is kept. If an application relies on multiple headers with the same key being set for security reasons, then Bref would lower the application security. For example, if an application sets multiple `Content-Security-Policy` headers, then Bref would just reflect the latest one. This vulnerability is patched in 2.1.13.

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CVSS v3.1 Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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/f834027aaf88b3885f4aa8edf6944ae920daf2dc https://github.com/brefphp/bref/security/advisories/GHSA-99f9-gv72-fw9r https://github.com/brefphp/bref/commit/f834027aaf88b3885f4aa8edf6944ae920daf2dc https://github.com/brefphp/bref/security/advisories/GHSA-99f9-gv72-fw9r

Exploits

https://github.com/brefphp/bref/security/advisories/GHSA-99f9-gv72-fw9r https://github.com/brefphp/bref/security/advisories/GHSA-99f9-gv72-fw9r

Frequently Asked Questions

What is CVE-2024-24753? +

Bref enable serverless PHP on AWS Lambda. When Bref is used in combination with an API Gateway with the v2 format, it does not handle multiple values headers. If PHP generates a response with two headers having the same key but different values only the latest one is kept. If an application relies on multiple headers with the same key being set for security reasons, then Bref would lower the application security. For example, if an application sets multiple `Content-Security-Policy` headers, then Bref would just reflect the latest one. This vulnerability is patched in 2.1.13. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2024-24753? +

CVE-2024-24753 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-24753? +

CVE-2024-24753 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-2024-24753? +

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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