Amazon Linux 2023 Security Advisory: ALAS2023-2025-1233
Advisory Released Date: 2025-10-27
Advisory Updated Date: 2025-10-27
A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client application into connecting to the attacker's malicious server. (CVE-2025-4476)
A vulnerability was found in the libsoup package. This flaw stems from its failure to correctly verify the termination of multipart HTTP messages. This can allow a remote attacker to send a specially crafted multipart HTTP body, causing the libsoup-consuming server to read beyond its allocated memory boundaries (out-of-bounds read). (CVE-2025-4969)
Affected Packages:
libsoup3
Issue Correction:
Run dnf update libsoup3 --releasever 2023.9.20251027 or dnf update --advisory ALAS2023-2025-1233 --releasever 2023.9.20251027 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
aarch64:
libsoup3-debuginfo-3.6.5-52.amzn2023.aarch64
libsoup3-3.6.5-52.amzn2023.aarch64
libsoup3-devel-3.6.5-52.amzn2023.aarch64
libsoup3-debugsource-3.6.5-52.amzn2023.aarch64
noarch:
libsoup3-doc-3.6.5-52.amzn2023.noarch
src:
libsoup3-3.6.5-52.amzn2023.src
x86_64:
libsoup3-debuginfo-3.6.5-52.amzn2023.x86_64
libsoup3-devel-3.6.5-52.amzn2023.x86_64
libsoup3-3.6.5-52.amzn2023.x86_64
libsoup3-debugsource-3.6.5-52.amzn2023.x86_64