CVE-2017-18662

Vulnerability

An information leak vulnerability exists in Samsung mobile devices running Android M(6.0) and N(7.x) software. The issue resides in the rkp (Remote Kernel Protection) log buffer, where data outside the buffer boundary is read, leading to unintended disclosure of kernel memory contents. Affected versions include all devices with those Android versions prior to the July 2017 security update (Samsung ID SVE-2017-9109).

Exploitation

An attacker requires local access to the device, as the vulnerability is triggered by reading the rkp log buffer. No user interaction is needed beyond the attacker having the ability to execute code or access system logs. The exact sequence involves accessing the rkp log buffer through a system call or debug interface that does not properly validate the read offset, allowing out-of-bounds reads.

Impact

Successful exploitation results in an information leak, exposing sensitive kernel data that could include memory addresses, cryptographic keys, or other confidential information. This compromises confidentiality but does not directly enable code execution or privilege escalation. The leaked data may aid in further attacks.

Mitigation

Samsung addressed this vulnerability in a security update released in July 2017. Users should ensure their devices are updated to the latest firmware via the Samsung Mobile Security update process [1]. No workaround is available for unpatched devices.