CVE-2021-0651 Explained : Impact and Mitigation
Learn about CVE-2021-0651, a critical DoS vulnerability in Android devices that allows attackers to disrupt device operation. Find mitigation steps and update guidance here.
Android devices are susceptible to a Denial of Service (DoS) vulnerability, CVE-2021-0651, which allows attackers to disrupt the normal operation of a device by exploiting a flaw in the loadLabel function of PackageItemInfo.java. This vulnerability could result in a local DoS attack without requiring additional execution privileges, but user interaction is necessary for successful exploitation.
Understanding CVE-2021-0651
This section delves into the specifics of the CVE-2021-0651 vulnerability.
What is CVE-2021-0651?
The vulnerability resides in the loadLabel function of PackageItemInfo.java, enabling a potential DoS attack on Android devices by leveraging a lengthy label in an application. The issue stems from inadequate input validation.
The Impact of CVE-2021-0651
Exploiting this vulnerability could lead to a local denial of service condition on the affected Android devices. Attackers can disrupt the device's normal operation without requiring additional privileges, posing a threat to user experience and device functionality.
Technical Details of CVE-2021-0651
Explore the technical aspects and implications of CVE-2021-0651.
Vulnerability Description
The vulnerability allows threat actors to trigger a DoS condition on Android devices by manipulating the label length within an app, exploiting the flaw in input validation within the loadLabel function of PackageItemInfo.java.
Affected Systems and Versions
Android versions 11, 9, and 10 are impacted by CVE-2021-0651, making devices running these versions vulnerable to the described DoS attack.
Exploitation Mechanism
To exploit this vulnerability, an attacker would require user interaction to execute a malicious app containing a lengthy label that triggers the DoS condition.
Mitigation and Prevention
Discover how to mitigate and prevent the risks associated with CVE-2021-0651.
Immediate Steps to Take
Users are advised to exercise caution while interacting with unfamiliar apps, especially those with lengthy labels. Avoidance of suspicious apps and granting unnecessary permissions can reduce the risk of exploitation.
Long-Term Security Practices
Adopting security best practices such as regularly updating Android devices with the latest patches and maintaining vigilance against potentially harmful applications can enhance the overall security posture.
Patching and Updates
Users should promptly apply security patches provided by Android to address CVE-2021-0651 and other known vulnerabilities, thus strengthening the device's defenses and safeguarding against potential attacks.