Denial-of-Service Vulnerability in libsoup HTTP Client Library
CVE-2025-4476

4.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
16 May 2025
đź”” Create Red Hat Vulnerability Alert

What is CVE-2025-4476?

A denial-of-service vulnerability exists within the libsoup HTTP client library, which can be triggered by a maliciously crafted 401 (Unauthorized) HTTP response. When a libsoup client interacts with an HTTP server that returns a malformed WWW-Authenticate header containing an unauthorized domain parameter, it may crash the client application. This vulnerability poses a risk as attackers can set up malicious servers to exploit it by misleading users into connecting to these harmful servers. Applications relying on the vulnerable version of libsoup are at risk of disruption due to this flaw.

References

https://access.redhat.com/security/cve/CVE-2025-4476
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2366513
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-4476 : Denial-of-Service Vulnerability in libsoup HTTP Client Library