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CVE-2025-20667: Information Disclosure Vulnerability in Modem due to Incorrect Error Handling

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Overview

The CVE-2025-20667 vulnerability refers to a potential information disclosure issue in modems due to improper error handling. This security flaw can lead to remote information disclosure when a User Equipment (UE) connects to a rogue base station controlled by an attacker. It is a critical issue as it does not require any additional execution privileges and can be exploited without user interaction, thereby threatening the confidentiality of affected systems.

Vulnerability Summary

CVE ID: CVE-2025-20667
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Modem | All versions prior to patch MOLY01513293

How the Exploit Works

The CVE-2025-20667 exploit works by taking advantage of incorrect error handling in modems. When a UE connects to a rogue base station controlled by an attacker, the attacker can exploit this vulnerability to disclose information remotely. This vulnerability does not require any additional execution privileges, and user interaction is not needed for its exploitation.

Conceptual Example Code

While the exact exploit code is not disclosed to protect systems’ security, an attacker might exploit the vulnerability in a similar way to the following conceptual example:

GET /modem/info HTTP/1.1
Host: roguebase.example.com

The attacker could use this request to retrieve sensitive information from the modem, taking advantage of the incorrect error handling.

Mitigation Guidance

To mitigate this vulnerability, it is advisable to apply the vendor patch with ID: MOLY01513293. In the absence of a patch, or until the patch can be applied, organizations can use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. Regularly monitoring network traffic for suspicious activities can also help in early detection and prevention.

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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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