vulnerability

Amazon Linux 2023: CVE-2023-27371: Medium priority package update for libmicrohttpd

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
Feb 28, 2023
Added
Aug 5, 2025
Modified
Aug 5, 2025

Description

GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.
An out-of-bounds flaw was found in GNU's libmicrohttpd due to improper parsing of a multipart/form-data boundary in the MHD_create_post_processor() method in postprocessor.c. This flaw allows an attacker to remotely send a malicious HTTP POST packet that includes one or more ‘\0’ bytes in a multipart/form-data boundary field, which, assuming a specific heap layout, will result in an out-of-bounds read and a crash in the find_boundary() function, causing a denial of service.

Solutions

amazon-linux-2023-upgrade-libmicrohttpdamazon-linux-2023-upgrade-libmicrohttpd-debuginfoamazon-linux-2023-upgrade-libmicrohttpd-debugsourceamazon-linux-2023-upgrade-libmicrohttpd-develamazon-linux-2023-upgrade-libmicrohttpd-doc
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