CVE-2023-21401: Android Device Memory Management Vulnerability Leading to Local Privilege Escalation
Summary
CVE-2023-21401: In DevmemIntChangeSparse of devicemem_server.c, there is a possible out of bounds write due to an integer overflow. Affects :unknown: versions >= SoCVersion:0, < SoCVersion:2023-12-05. Fixed in SoCVersion:2023-12-05. How to fix ↓
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Background
The vulnerability affects the Android ecosystem, specifically within the device memory management component. This component is responsible for handling memory allocation and access for various applications and system processes. The vulnerability arises from an integer overflow in the DevmemIntChangeSparse function of the devicemem_server.c file, which can lead to unintended memory writes, potentially compromising system integrity.
Vulnerability Detail
In the DevmemIntChangeSparse function of devicemem_server.c, an integer overflow can occur, resulting in an out-of-bounds write. This vulnerability allows for local escalation of privileges within the kernel, meaning that an attacker could gain higher access rights without needing additional execution privileges. The exploitation of this vulnerability does not require user interaction, making it particularly dangerous.
How To Fix
Minimum fixed version
SoCVersion:2023-12-05
This is the first release that contains the fix.
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Workaround
Currently, there are no specific workarounds available for this vulnerability. The best course of action is to apply the patch as soon as it becomes available.
Conclusion
CVE-2023-21401 represents a significant security vulnerability within the Android ecosystem, specifically related to device memory management. Users are strongly advised to update their systems to the latest patched version to protect against potential exploitation. Monitoring tools like Vulert can assist in identifying vulnerabilities in real-time.
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FAQ
CVE-2023-21401 is a vulnerability in the Android device memory management system that allows for local privilege escalation due to an integer overflow.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
The primary risk is local escalation of privileges, which could allow an attacker to gain unauthorized access to sensitive system resources and data.
No, user interaction is not needed for exploitation, making it a critical security concern.
While there are no specific workarounds, it is crucial to prioritize updating your device to the patched version as soon as possible to mitigate the risks.
References
Related vulnerabilities
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