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CVE-2025-20678: Remote Denial of Service Exploit in IMS Service

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Overview

The CVE-2025-20678 vulnerability is a significant flaw in the IMS service that, if exploited, could lead to a system crash due to incorrect error handling. This vulnerability is particularly dangerous as the user interaction is not required for its exploitation and no additional execution privileges are needed. This can lead to a potential system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-20678
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

IMS Service | All versions prior to patch MOLY01394606

How the Exploit Works

An attacker could exploit this vulnerability by setting up a rogue base station and persuading a UE (User Equipment) to connect to it. Once connected, the rogue base station would send a series of malformed packets to the IMS service triggering an incorrect error handling, which could ultimately lead to a system crash.

Conceptual Example Code

Here is a conceptual example of the rogue base station sending a malformed packet to trigger the vulnerability:

POST /IMS_Service/endpoint HTTP/1.1
Host: rogueBaseStation.com
Content-Type: application/json
{ "malicious_payload": "malformed_packet_triggering_incorrect_error_handling" }

Mitigation Guidance

The best way to mitigate this vulnerability is by applying the vendor patch with Patch ID: MOLY01394606. In cases where applying the patch is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary solution. However, it’s important to note that these are not permanent fixes and the patch should be applied as soon as feasible.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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