CVE-2021-0933 : Security Advisory and Response

Android devices running Android-9, Android-10, Android-11, and Android-12 are vulnerable to a privilege escalation flaw that could allow a remote attacker to manipulate a consent dialog, potentially tricking users into pairing with a malicious Bluetooth device without requiring additional permissions. This CVE highlights a critical security issue in the CompanionDeviceActivity.java or DeviceChooserActivity.java that requires user interaction for exploitation.

Understanding CVE-2021-0933

This section delves into the specifics of the CVE-2021-0933 vulnerability.

What is CVE-2021-0933?

The CVE-2021-0933 vulnerability affects Android versions 9 to 12 and involves improper input validation in certain Android activities, allowing HTML tags to interfere with consent dialogs. This flaw enables a remote attacker to carry out an elevation of privilege attack by tricking users into unknowingly pairing with a malicious Bluetooth device.

The Impact of CVE-2021-0933

The impact of CVE-2021-0933 is significant, as it could lead to remote escalation of privilege. Attackers could exploit this vulnerability to deceive users into pairing with unauthorized Bluetooth devices, compromising the security and integrity of the affected Android devices.

Technical Details of CVE-2021-0933

Explore the technical aspects of CVE-2021-0933 and how it affects systems and versions.

Vulnerability Description

The vulnerability stems from improper input validation in CompanionDeviceActivity.java or DeviceChooserActivity.java, allowing HTML tags to disrupt consent dialogs and facilitate a remote escalation of privilege attack.

Affected Systems and Versions

Android versions 9, 10, 11, and 12 are vulnerable to CVE-2021-0933, exposing devices running these versions to the risk of privilege escalation attacks via malicious Bluetooth pairings.

Exploitation Mechanism

Exploiting CVE-2021-0933 requires user interaction, as attackers can manipulate consent dialogs to deceive users into accepting pairings with rogue Bluetooth devices.

Mitigation and Prevention

Discover the essential steps to mitigate the risks associated with CVE-2021-0933.

Immediate Steps to Take

Users are advised to exercise caution and avoid pairing with unknown Bluetooth devices. Furthermore, applying relevant security updates is crucial to protect against potential attacks exploiting this vulnerability.

Long-Term Security Practices

To enhance device security in the long term, users should follow best security practices, such as avoiding suspicious Bluetooth pairings and keeping their devices up to date with the latest security patches.

Patching and Updates

Google has released security updates addressing CVE-2021-0933. Users should promptly update their devices to the latest Android versions to safeguard against potential exploitation of this vulnerability.