CVE-2021-3588 : Security Advisory and Response

A detailed overview of CVE-2021-3588, focusing on the memory contents disclosure vulnerability in cli_feat_read_cb.

Understanding CVE-2021-3588

This section provides insights into the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-3588?

The CVE-2021-3588 vulnerability exists in the cli_feat_read_cb() function within BlueZ's src/gatt-database.c. It results in a lack of bounds checks on the 'offset' variable, allowing it to be used as an array index for reading.

The Impact of CVE-2021-3588

The lack of bounds checks can lead to memory contents disclosure, potentially exposing sensitive data to unauthorized parties.

Technical Details of CVE-2021-3588

Explore the specific technical aspects, affected systems, and exploitation mechanisms of CVE-2021-3588.

Vulnerability Description

The issue arises due to the absence of proper bounds validation on the 'offset' variable, leading to an out-of-bounds read.

Affected Systems and Versions

BlueZ versions prior to 5.56 are affected by this vulnerability due to the unbounded indexing of the 'offset' variable.

Exploitation Mechanism

An attacker could leverage this vulnerability to read memory contents beyond the allocated buffer size, potentially accessing sensitive information.

Mitigation and Prevention

Discover the immediate steps and long-term practices to mitigate the risks posed by CVE-2021-3588.

Immediate Steps to Take

Users are advised to apply patches promptly and monitor security advisories for updates regarding BlueZ.

Long-Term Security Practices

Implement secure coding practices, perform regular security assessments, and maintain up-to-date software versions to prevent similar vulnerabilities.

Patching and Updates

Ensure that affected systems are patched with the latest updates provided by BlueZ to address the memory contents disclosure vulnerability.