USN-7543-1: libsoup vulnerabilities

Publication date

28 May 2025

Overview

libsoup could be made to crash if it received specially crafted network traffic.


Packages

  • libsoup2.4 - HTTP client/server library for GNOME
  • libsoup3 - HTTP client/server library for GNOME

Details

Jan Różański discovered that libsoup incorrectly handled certain headers
when sending HTTP/2 requests over TLS. An attacker could possibly use this
issue to cause a denial of service. This issue only affected libsoup3 in
Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-32908)

Jan Różański discovered that libsoup incorrectly parsed certain response
headers. An attacker could possibly use this issue to cause a denial of
service. (CVE-2025-4476)

Jan Różański discovered that libsoup incorrectly handled certain headers
when sending HTTP/2 requests over TLS. An attacker could possibly use this
issue to cause a denial of service. This issue only affected libsoup3 in
Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2025-32908)

Jan Różański discovered that libsoup incorrectly parsed certain response
headers. An attacker could possibly use this issue to cause a denial of
service. (CVE-2025-4476)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.04 plucky libsoup-2.4-1 –  2.74.3-10ubuntu0.3
libsoup-3.0-0 –  3.6.5-1ubuntu0.1
24.10 oracular libsoup-2.4-1 –  2.74.3-7ubuntu0.5
libsoup-3.0-0 –  3.6.0-2ubuntu0.4
24.04 noble libsoup-2.4-1 –  2.74.3-6ubuntu1.5
libsoup-3.0-0 –  3.4.4-5ubuntu0.4
22.04 jammy libsoup-3.0-0 –  3.0.7-0ubuntu1+esm4  
libsoup2.4-1 –  2.74.2-3ubuntu0.5
20.04 focal libsoup2.4-1 –  2.70.0-1ubuntu0.5
18.04 bionic libsoup2.4-1 –  2.62.1-1ubuntu0.4+esm4  
16.04 xenial libsoup2.4-1 –  2.52.2-1ubuntu0.3+esm3  

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