CVE-2023-21190 : What You Need to Know

This CVE record highlights a vulnerability in the Android operating system that could potentially lead to local information disclosure without requiring additional execution privileges, due to a remote device being able to turn off encryption in a specific scenario.

Understanding CVE-2023-21190

This section will delve into the details of CVE-2023-21190, shedding light on the nature of the vulnerability and its potential impact.

What is CVE-2023-21190?

CVE-2023-21190 involves a vulnerability in the btm_acl_encrypt_change function within btm_acl.cc, presenting a way for a remote device to disable encryption without causing a connection termination. This loophole may result in local information disclosure, with the exploitation requiring user interaction.

The Impact of CVE-2023-21190

The impact of this vulnerability is the potential exposure of sensitive information stored locally on an affected Android device. Attackers could exploit this flaw to gain access to data without the need for elevated privileges, posing a risk to user privacy.

Technical Details of CVE-2023-21190

This section will provide a deeper dive into the technical aspects of CVE-2023-21190, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability lies in the btm_acl_encrypt_change function of btm_acl.cc, allowing a remote device to disable encryption without causing a connection termination, leading to local information disclosure.

Affected Systems and Versions

The affected system is Android, specifically version Android-13. Devices running this version are susceptible to the exploitation of CVE-2023-21190.

Exploitation Mechanism

To exploit this vulnerability, a remote device needs to trigger the btm_acl_encrypt_change function, resulting in encryption being turned off without terminating the connection. This action could then allow for the disclosure of local information.

Mitigation and Prevention

In order to protect systems and devices from the risks posed by CVE-2023-21190, appropriate mitigation and prevention strategies need to be implemented.

Immediate Steps to Take

Users are advised to exercise caution and avoid interacting with potentially malicious remote devices to mitigate the risk of exploitation. Additionally, staying informed about security updates is crucial.

Long-Term Security Practices

Implementing robust security practices, such as regularly updating software, using secure connections, and being vigilant against suspicious activities, can contribute to long-term protection against vulnerabilities like CVE-2023-21190.

Patching and Updates

It is essential for users to promptly apply security patches and updates provided by Android to address vulnerabilities like CVE-2023-21190. By keeping systems up to date, the likelihood of exploitation decreases significantly.