CVE-2021-0467: Android Bootloader Out of Bounds Write Vulnerability
Summary
CVE-2021-0467: In (TBD) of (TBD), there is a possible out of bounds write due to an incorrect bounds check. Affects :unknown: versions >= SoCVersion:0, < SoCVersion:2021-05-05. Fixed in SoCVersion:2021-05-05. How to fix ↓
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Background
The Android bootloader is a critical component of the Android operating system, responsible for initializing the hardware and loading the operating system. It operates at a low level, directly interacting with the device's hardware. This vulnerability arises from an incorrect bounds check, making it susceptible to exploitation if physical USB access is available. The bootloader's role in device security makes this vulnerability particularly concerning, as it could allow an attacker to escalate privileges locally.
Vulnerability Detail
In the Android bootloader, there exists a possible out of bounds write due to an incorrect bounds check. This vulnerability can lead to local escalation of privilege, allowing an attacker with physical USB access to manipulate the bootloader without requiring additional execution privileges. User interaction is not necessary for exploitation, making it a significant security risk.
How To Fix
Minimum fixed version
SoCVersion:2021-05-05
This is the first release that contains the fix.
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Workaround
Currently, there are no specific workarounds to mitigate this vulnerability other than applying the patch. Users are advised to keep their devices updated to the latest firmware to protect against potential exploitation.
Conclusion
CVE-2021-0467 represents a critical vulnerability in the Android bootloader that can lead to local privilege escalation. Users are strongly encouraged to update their devices to the patched version to safeguard against potential exploitation. Regular monitoring for vulnerabilities, such as through Vulert, can help maintain security.
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FAQ
CVE-2021-0467 is a vulnerability in the Android bootloader that allows for an out of bounds write due to an incorrect bounds check, potentially leading to local privilege escalation.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities in real-time.
No, user interaction is not needed for exploitation, making this vulnerability particularly dangerous.
If your device is vulnerable, you should update to the patched version of the bootloader released on May 5, 2021, to mitigate the risk.
Vulert is a tool that monitors and alerts for open-source vulnerabilities in software using just the gradle.lockfile, without requiring access to the code or installation.
References
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