CVE-2021-0393 : Security Advisory and Response
Learn about CVE-2021-0393, a critical vulnerability in Android that could allow remote code execution. Understand the impact, affected systems, and mitigation steps.
Android is affected by a vulnerability in Scanner::LiteralBuffer::NewCapacity function, potentially leading to remote code execution without user interaction. This CVE identifies an out-of-bounds write due to an integer overflow.
Understanding CVE-2021-0393
Android's vulnerability, tracked by CVE-2021-0393, poses a risk of remote code execution when handling a malicious PAC file.
What is CVE-2021-0393?
The CVE-2021-0393 vulnerability in Android's scanner.cc involves an integer overflow issue, allowing potential attackers to execute remote code without the need for additional privileges or user interaction.
The Impact of CVE-2021-0393
This vulnerability could be exploited by attackers to execute arbitrary code remotely on affected Android systems, posing a significant security risk and requiring immediate attention.
Technical Details of CVE-2021-0393
The technical details of CVE-2021-0393 include:
Vulnerability Description
The vulnerability occurs in Scanner::LiteralBuffer::NewCapacity due to an integer overflow, enabling an out-of-bounds write that can be leveraged for remote code execution.
Affected Systems and Versions
Android versions from Android-8.1 to Android-11 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by supplying a malicious PAC file, with no user interaction necessary for the exploitation.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-0393, the following steps are recommended:
Immediate Steps to Take
Users should update their Android devices to the latest security patches provided by Google immediately to prevent exploitation of this vulnerability.
Long-Term Security Practices
Implementing robust security protocols and keeping systems up to date with the latest software patches is crucial to prevent future vulnerabilities.
Patching and Updates
Regularly check for security updates from Google and apply them promptly to safeguard against potential threats.