CVSS 3.1 Score 5.3 of 10 (medium)


Published Mar 22, 2024
CWE ID 400


CVE-2024-29186 is a vulnerability found in Bref prior to version 2.1.17, an open-source project that facilitates serverless deployments on Amazon Web Services with PHP. The vulnerability occurs when Bref is used with the Event-Driven Function runtime and the handler is a RequestHandlerInterface. In this scenario, if the request is a MultiPart, the Content-Type header of each part is read using the Riverline/multipart-parser library. The library performs slow multi-byte string operations on the header value, specifically using the mb_convert_encoding function. This can be exploited by an attacker to send specially crafted requests that trigger long operations and result in a longer billed duration for the server. The attack requires certain conditions to be met and has limitations.

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