CVE-2025-4476

Publication date 16 May 2025

Last updated 30 May 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.3 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
libsoup2.4 25.04 plucky
Fixed 2.74.3-10ubuntu0.3
24.10 oracular
Fixed 2.74.3-7ubuntu0.5
24.04 LTS noble
Fixed 2.74.3-6ubuntu1.5
22.04 LTS jammy
Fixed 2.74.2-3ubuntu0.5
20.04 LTS focal
Fixed 2.70.0-1ubuntu0.5
18.04 LTS bionic
Fixed 2.62.1-1ubuntu0.4+esm4
16.04 LTS xenial
Fixed 2.52.2-1ubuntu0.3+esm3
libsoup3 25.04 plucky
Fixed 3.6.5-1ubuntu0.1
24.10 oracular
Fixed 3.6.0-2ubuntu0.4
24.04 LTS noble
Fixed 3.4.4-5ubuntu0.4
22.04 LTS jammy
Fixed 3.0.7-0ubuntu1+esm4
20.04 LTS focal Not in release

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Severity score breakdown

Parameter Value
Base score 4.3 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L