Belledonne Communications Linphone-Desktop

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1. EXECUTIVE SUMMARY CVSS v4 8.7 ATTENTION: Exploitable remotely/low attack complexity Vendor: Belledonne Communications Equipment: Linphone-Desktop Vulnerability: NULL Pointer Dereference
2. RISK EVALUATION Successful exploitation of this vulnerability could could result in a remote attacker causing a denial-of-service condition on the affected devices.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following version of Linphone-Desktop is affected: Linphone-Desktop: Version 5.2.6 3.2 VULNERABILITY OVERVIEW 3.2.1 NULL POINTER DEREFERENCE CWE-476 The affected product is vulnerable to a NULL Dereference vulnerability, which could allow a remote attacker to create a denial-of-service condition. CVE-2025-0430 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). A CVSS v4 score has also been calculated for CVE-2025-0430. A base score of 8.7 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Communications COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: France 3.4 RESEARCHER Vera Mens of Claroty Research - Team82 reported this vulnerability to CISA.
4. MITIGATIONS Belledonne Communications recommends users implement the fix in Version 5.3.99 of the linphone-sdk. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY January 14, 2025: Initial Publication