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CVE-2025-32908: Misinterpretation of Input

0
High
VulnerabilityCVE-2025-32908cvecve-2025-32908
Published: Mon Apr 14 2025 (04/14/2025, 14:00:30 UTC)
Source: CVE

Description

A flaw was found in libsoup. The HTTP/2 server in libsoup may not fully validate the values of pseudo-headers :scheme, :authority, and :path, which may allow a user to cause a denial of service (DoS).

AI-Powered Analysis

AILast updated: 09/26/2025, 00:28:22 UTC

Technical Analysis

CVE-2025-32908 is a high-severity vulnerability identified in libsoup, specifically affecting its HTTP/2 server implementation. Libsoup is a GNOME HTTP client/server library widely used in Linux-based systems and applications for handling HTTP communications. The vulnerability arises from improper validation of HTTP/2 pseudo-header fields, namely :scheme, :authority, and :path. These pseudo-headers are critical components of the HTTP/2 protocol, representing the request's scheme (e.g., http or https), the target authority (host and port), and the request path, respectively. The flaw allows an attacker to craft malicious HTTP/2 requests with malformed or unexpected values in these pseudo-headers, which the libsoup HTTP/2 server fails to fully validate. This can lead to a denial of service (DoS) condition by causing the server to crash or become unresponsive. The vulnerability does not impact confidentiality or integrity but directly affects availability. The CVSS v3.1 score of 7.5 (high) reflects the network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and impact limited to availability (A:H). No known exploits are currently reported in the wild, but the ease of exploitation and the critical nature of HTTP/2 servers make this a significant concern. The vulnerability was published on April 14, 2025, and is tracked under CVE-2025-32908. No patches or vendor-specific mitigations are listed yet, indicating that affected parties should monitor for updates and consider interim protective measures.

Potential Impact

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on libsoup-based HTTP/2 servers in their infrastructure or applications. A successful exploitation can cause denial of service, leading to service outages, degraded user experience, and potential disruption of business operations. This is particularly critical for sectors that depend on high availability and real-time data exchange, such as financial services, healthcare, telecommunications, and public services. The DoS could be leveraged as part of a broader attack campaign to disrupt services or as a diversion for other malicious activities. Since libsoup is commonly used in Linux environments, organizations with Linux-based web services, embedded systems, or IoT devices that utilize libsoup for HTTP/2 communications are at risk. The vulnerability does not expose data confidentiality or integrity but can impact operational continuity and availability, which are vital for compliance with European regulations such as GDPR and NIS Directive, which mandate service reliability and incident response.

Mitigation Recommendations

To mitigate CVE-2025-32908, European organizations should: 1) Monitor official sources and security advisories for patches or updates to libsoup and apply them promptly once available. 2) Implement network-level protections such as rate limiting and anomaly detection on HTTP/2 traffic to identify and block malformed requests targeting pseudo-header fields. 3) Employ Web Application Firewalls (WAFs) or HTTP/2-aware proxies that can validate and sanitize incoming HTTP/2 requests before they reach the libsoup server. 4) Consider temporarily disabling HTTP/2 support in libsoup-based services if feasible, reverting to HTTP/1.1 until a patch is applied. 5) Conduct thorough testing of all applications and services using libsoup to identify exposure and prioritize remediation. 6) Enhance monitoring and alerting for unusual service crashes or availability issues that could indicate exploitation attempts. 7) Educate security teams about this specific vulnerability to improve incident detection and response readiness. These steps go beyond generic advice by focusing on HTTP/2-specific controls and operational adjustments tailored to libsoup's usage.

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Technical Details

Data Version
5.1
Assigner Short Name
redhat
Date Reserved
2025-04-14T01:37:48.152Z
Cisa Enriched
true
Cvss Version
3.1
State
PUBLISHED

Threat ID: 682cd0fc1484d88663aecbcf

Added to database: 5/20/2025, 6:59:08 PM

Last enriched: 9/26/2025, 12:28:22 AM

Last updated: 10/16/2025, 3:17:13 PM

Views: 24

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