CVE-2018-21074

Vulnerability

CVE-2018-21074 is an issue discovered on Samsung mobile devices with M (6.x) software, specifically those using Exynos or Qualcomm chipsets [1]. The vulnerability resides in a Trustlet component, where debug logs inadvertently expose sensitive information. No specific version numbers beyond the M (6.x) base are provided in the available references.

Exploitation

An attacker would need local access or some ability to read debug logs produced by the Trustlet. The exact attack vector is not detailed in the provided references, but the core requirement is the ability to access the debug log output where the Trustlet writes information.

Impact

Successful exploitation leads to information disclosure from the Trustlet [1]. The nature of the disclosed information is not specified, but it may include sensitive data handled by the secure Trustlet environment, potentially compromising confidentiality on the affected device.

Mitigation

Samsung addressed this issue in their April 2018 security update, as indicated by the Samsung ID SVE-2017-10638 [1]. Users should update their devices to the latest firmware to receive the fix. No other workarounds are documented in the available references.