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Medium ALAS2023-2025-1233 2 CVEs

Moderate: libsoup3 security update (Amazon Linux 2023)

Published Oct 27, 2025 · Updated Oct 27, 2025

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-4969: 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-2025-4476: 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.

Fixed packages 5

ReleasePackageFixed in
Amazon Linux · 2023 libsoup3 0:3.6.5-52.amzn2023
Amazon Linux · 2023 libsoup3-debuginfo 0:3.6.5-52.amzn2023
Amazon Linux · 2023 libsoup3-debugsource 0:3.6.5-52.amzn2023
Amazon Linux · 2023 libsoup3-devel 0:3.6.5-52.amzn2023
Amazon Linux · 2023 libsoup3-doc 0:3.6.5-52.amzn2023

Vulnerabilities 2

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-4476.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-4969.html