CVE-2023-21492: Samsung Mobile Devices Insertion of Sensitive Information Into Log File Vulnerability

CVE-2023-21492 is an insertion of sensitive information into log file vulnerability affecting Samsung mobile devices. It allows a privileged local attacker to bypass address space layout randomization (ASLR) on devices running Android 11, 12, and 13. This matters because ASLR is a core memory-protection mechanism; bypassing it can make follow-on exploitation of other flaws easier for an attacker who already has elevated local access.

Organizations that issue or manage Samsung Android handsets should treat this as a local privilege-escalation enabler rather than a remote code-execution issue. Confirm exact scope and fixed builds against the vendor advisory before acting.

How it works

The weakness is classified as CWE-532: Insertion of Sensitive Information Into Log File. In this class of flaw, components write data that should remain private—such as memory addresses or layout details—into system or application logs that a privileged local user can read. An attacker who already holds elevated privileges on the device can harvest those log entries and use the leaked information to defeat ASLR. Without ASLR randomization, subsequent memory-corruption attacks become more reliable because the attacker can predict where code and data reside. The CISA summary states that the vulnerability specifically enables an ASLR bypass; no further exploit mechanics are provided in the public record, so teams should not assume remote reachability or unauthenticated access.

Am I affected? How to find it in your systems

Samsung mobile devices running Android 11, 12, or 13 are in scope. These devices commonly appear as corporate-owned or BYOD handsets managed by MDM/EMM platforms, or as personally owned phones that connect to enterprise email, VPN, or Wi-Fi. Inventory steps:

• Query your MDM or asset database for Samsung models and their reported Android version.
• On unmanaged devices, check Settings → About phone → Android version and security patch level.
• Review device enrollment logs and compliance reports for any Samsung handset still on Android 11–13.

Because the attack requires local privileged access, look for signs of prior compromise: unexpected privileged apps, unusual log-file access patterns, or ADB/root indicators. Standard Android logcat or vendor diagnostic logs may contain the sensitive entries; however, exact log names and content are not detailed publicly—confirm against the vendor advisory. Telemetry that flags local privilege escalation or anomalous process memory probing can serve as secondary indicators.

How to remediate

Apply the security updates released by Samsung according to the vendor instructions, as required by CISA. Prioritize devices that still run Android 11, 12, or 13. After patching:

• Verify the new security patch level via MDM or on-device settings.
• Re-image or factory-reset any device that showed signs of prior local compromise.
• Harden logging configuration where the platform allows: restrict log access to system processes only and disable verbose or debug logging on production devices.
• Enforce least-privilege app permissions and disable unnecessary developer options or ADB.

These steps close the information-leak path and reduce the value of any residual log data.

If you can't patch immediately

Until the vendor update can be deployed, apply compensating controls that limit local privileged access and reduce the usefulness of leaked information:

• Segment corporate Wi-Fi and VPN so that unpatched Samsung devices cannot reach high-value internal resources.
• Use MDM to enforce strong device encryption, lock-screen requirements, and app-installation restrictions that prevent unauthorized privileged apps.
• Disable or tightly control ADB, USB debugging, and any OEM diagnostic modes that expand the local attack surface.
• Monitor for anomalous local privilege use or unexpected log-file reads via EDR/MDM telemetry; alert on devices that fall out of compliance.
• If a web application firewall or mobile-threat-defense solution is in use, ensure it is configured to flag suspicious local activity, though virtual patching of a log-file leak is limited.

These measures shrink the window of opportunity for an attacker who already has a foothold.

If your data may have been exposed

Actively exploited local vulnerabilities can lead to broader device compromise and subsequent data exposure. While ransomware use of this CVE is not documented, any successful ASLR bypass may enable further attacks that harvest credentials or corporate data stored on the handset. Organizations should review device logs and MDM alerts for signs of compromise, rotate credentials that may have been accessible from the device, and consider a free exposure scan of corporate email addresses against known breach data sets to identify secondary credential leaks.