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In the `MediaSessionRecord.java` file, the `sendCommand` function improperly handles requests to launch a Foreground Service (FGS). Normally, Android restricts background apps from starting FGS to conserve resources and protect user privacy. This vulnerability allows a malicious, backgrounded application to bypass these “while-in-use” restrictions.
By crafting a specific command sent to the system’s media session controller, an attacker can trick the Android framework. The flaw causes the system to incorrectly grant the requesting app the elevated permissions associated with a foreground service. This happens without requiring any user interaction or additional execution privileges from the victim.
The exploiting app gains a persistent foreground service priority from the background. This elevated privilege allows it to perform actions typically reserved for visible, user-interactive apps, leading to a local escalation of privilege on the compromised device.
Platform: Android
Version: Multiple versions
Vulnerability: Privilege Escalation
Severity: Critical
date: 12/08/2025
Prediction: Next security patch
What Undercode Say:
Showing bash commands and codes related to the blog
`am broadcast` (send intents)
`service call media.session` (interact session)
`logcat | grep` (filter logs)
Analyze `MediaSessionRecord.java` patch.
How Exploit:
A malicious app, installed and running in the background, calls the vulnerable `sendCommand` method within the Android media framework. It sends a crafted command that abuses the FGS launch logic. The system erroneously elevates the app’s privileges to foreground service level, allowing it to execute high-privilege operations from the background without user consent.
Protection from this CVE
Apply the official Android security patch from Google that addresses CVE-2025-48573. Restrict app installations to trusted sources like the Google Play Store. Monitor device behavior for unexpected battery drain or performance issues, which may indicate foreground service abuse.
Impact:
Local privilege escalation allowing a background app to gain foreground service permissions. This can lead to persistent device access, data theft, and evasion of background execution limits, compromising device security and user privacy.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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