Amazon Linux 2023 Security Advisory: ALAS2023-2025-1133
Advisory Released Date: 2025-08-08
Advisory Updated Date: 2025-08-08
Severity:
Medium
Issue Overview:
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. (CVE-2023-27371)
Affected Packages:
libmicrohttpd
Issue Correction:
Run dnf update libmicrohttpd --releasever 2023.8.20250808 or dnf update --advisory ALAS2023-2025-1133 --releasever 2023.8.20250808 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
libmicrohttpd-debuginfo-0.9.73-1.amzn2023.0.4.aarch64
libmicrohttpd-0.9.73-1.amzn2023.0.4.aarch64
libmicrohttpd-devel-0.9.73-1.amzn2023.0.4.aarch64
libmicrohttpd-debugsource-0.9.73-1.amzn2023.0.4.aarch64
noarch:
libmicrohttpd-doc-0.9.73-1.amzn2023.0.4.noarch
src:
libmicrohttpd-0.9.73-1.amzn2023.0.4.src
x86_64:
libmicrohttpd-debuginfo-0.9.73-1.amzn2023.0.4.x86_64
libmicrohttpd-devel-0.9.73-1.amzn2023.0.4.x86_64
libmicrohttpd-0.9.73-1.amzn2023.0.4.x86_64
libmicrohttpd-debugsource-0.9.73-1.amzn2023.0.4.x86_64