CVE-2022-39902 is a security vulnerability identified in Samsung Mobile devices that utilize the Exynos baseband processor prior to the SMR (Security Maintenance Release) DEC-2022 Release 1 update. The vulnerability is classified under CWE-285, which pertains to improper authorization. Specifically, this flaw allows a remote attacker to bypass authorization controls within the Exynos baseband firmware by exploiting the emergency call functionality. Through this vector, the attacker can retrieve sensitive device information, notably the International Mobile Equipment Identity (IMEI) number, without requiring user authentication or interaction beyond initiating an emergency call. The Exynos baseband is responsible for managing cellular communication functions, and improper authorization here indicates that the baseband firmware does not adequately verify permissions before disclosing sensitive data. Although no known exploits have been reported in the wild, the vulnerability poses a privacy risk by exposing device identifiers that can be used for device tracking, cloning, or targeted attacks. The lack of a patch link suggests that remediation is expected via Samsung's regular security maintenance releases, specifically the December 2022 update or later. The vulnerability does not appear to allow arbitrary code execution or direct compromise of device integrity or availability but does leak sensitive information that could facilitate further attacks.

For European organizations, the exposure of IMEI and other sensitive device information via this vulnerability could have several implications. IMEI numbers are unique device identifiers that can be used to track devices, link devices to users, or clone devices for fraudulent purposes. Organizations with mobile fleets using vulnerable Samsung devices may face increased risks of device impersonation or unauthorized tracking, potentially compromising employee privacy and operational security. Additionally, attackers could leverage the leaked information to craft more sophisticated phishing or social engineering campaigns targeting employees. While the vulnerability does not directly compromise device integrity or availability, the leakage of sensitive identifiers can undermine trust in mobile device security and complicate incident response efforts. Given the widespread use of Samsung mobile devices across European enterprises and public sector entities, especially in sectors like telecommunications, finance, and government, the vulnerability could affect a broad range of users. The risk is heightened in environments where mobile devices are used to access sensitive corporate resources or handle confidential communications.

To mitigate this vulnerability, European organizations should prioritize the following actions: 1) Ensure all Samsung mobile devices, particularly those with Exynos baseband processors, are updated to the latest firmware version that includes the SMR DEC-2022 Release 1 or later security patches. This update addresses the improper authorization flaw. 2) Implement mobile device management (MDM) solutions to enforce timely patch deployment and monitor device compliance status. 3) Restrict or monitor the use of emergency call features where feasible, especially on corporate devices, to detect anomalous usage patterns that might indicate exploitation attempts. 4) Educate employees about the risks of device information leakage and encourage vigilance against phishing attempts that could leverage leaked IMEI data. 5) Collaborate with Samsung support channels to obtain official patch releases and advisories promptly. 6) For high-security environments, consider additional device-level encryption and network-level protections to limit the impact of any leaked identifiers. 7) Regularly audit device inventories to identify and replace unsupported or unpatchable devices that may remain vulnerable.