CVE-2024-24752

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 for each which contains a file, it is extracted and saved in `/tmp` with a random filename starting with `bref_upload_`. The flow mimics what plain PHP does but it does not delete the temporary files when the request has been processed. An attacker could fill the Lambda instance disk by performing multiple MultiPart requests containing files. This vulnerability is patched in 2.1.13.

• CWE-400
• CWE-770

• https://github.com/brefphp/bref/commit/350788de12880b6fd64c4c318ba995388bec840ePatch
• https://github.com/brefphp/bref/security/advisories/GHSA-x4hh-frx8-98r5Exploit, Vendor Advisory
• https://github.com/brefphp/bref/commit/350788de12880b6fd64c4c318ba995388bec840ePatch
• https://github.com/brefphp/bref/security/advisories/GHSA-x4hh-frx8-98r5Exploit, Vendor Advisory

Published

Feb 1, 2024

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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