CVE-2023-40132: Android Framework RingtoneManager Local Privilege Escalation Vulnerability
Summary
CVE-2023-40132: In setActualDefaultRingtoneUri of RingtoneManager.java, there is a possible way to bypass content providers read permissions due to a missing permission check. Affects platform/frameworks/base across 5 version ranges.
>= 12:0, < 12:2025-01-01
>= 12L:0, < 12L:2025-01-01
>= 13:0, < 13:2025-01-01
>= 14:0, < 14:2025-01-01
>= 15-next:0, < 15-next:2025-01-01
Fixed in 15-next:2025-01-01. How to fix ↓
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Background
The Android Framework is a comprehensive software stack that provides the necessary tools and libraries for developing Android applications. One of its components, RingtoneManager, is responsible for managing audio files such as ringtones, notifications, and alarms. This component allows applications to set and retrieve audio settings, but it is crucial that proper permission checks are in place to prevent unauthorized access to sensitive data.
Vulnerability Detail
In the RingtoneManager.java file, specifically in the setActualDefaultRingtoneUri method, there exists a vulnerability due to a missing permission check. This oversight allows local applications to bypass content provider read permissions, potentially leading to unauthorized access to sensitive audio data. The vulnerability can be exploited by an attacker with local access to the device, requiring user interaction to trigger the exploit. The ramifications of this vulnerability include local escalation of privileges without needing additional execution privileges, which could compromise user privacy and security.
How To Fix
Minimum fixed version
15-next:2025-01-01
This is the first release that contains the fix.
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Workaround
As a temporary workaround, users can limit the permissions granted to applications that may exploit this vulnerability. This can be done by reviewing app permissions in the device settings and revoking unnecessary permissions for apps that handle audio settings.
Conclusion
The CVE-2023-40132 vulnerability in the Android Framework's RingtoneManager poses a significant risk due to its potential for local privilege escalation. Users are strongly advised to update their devices to the latest patched versions to mitigate this risk. Additionally, utilizing tools like Vulert can help monitor and alert users about open-source vulnerabilities in real-time.
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FAQ
CVE-2023-40132 is a vulnerability in the Android Framework's RingtoneManager that allows local privilege escalation due to a missing permission check.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which monitors open-source vulnerabilities without requiring code access.
The risks include unauthorized access to sensitive audio data and potential compromise of user privacy, as local applications could exploit this vulnerability.
Yes, patches are available in the fixed versions of the Android Framework, specifically versions 15-next:2025-01-01, 12:2025-01-01, 13:2025-01-01, and 14:2025-01-01.
If updating is not possible, consider limiting app permissions and monitoring for any suspicious activity on your device.
References
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