CVE-2021-22547 : Vulnerability Insights and Analysis
Learn about CVE-2021-22547, a buffer overrun vulnerability in Google Cloud IoT Device SDK for Embedded C. Understand its impact, technical details, and mitigation steps.
A buffer overrun vulnerability was identified in the Google Cloud IoT Device SDK for Embedded C. An attacker could exploit this flaw to gain unauthorized access to sensitive data. It is crucial to understand the impact, technical details, and mitigation strategies related to CVE-2021-22547.
Understanding CVE-2021-22547
This section delves into the specifics of the vulnerability and its implications.
What is CVE-2021-22547?
The vulnerability arises from the implementation of calloc() in the IoT Devices SDK, lacking a length check. This oversight allows an attacker to manipulate memory objects, potentially leading to unauthorized access to the heap.
The Impact of CVE-2021-22547
With a CVSS base score of 6.3, this medium-severity vulnerability poses a threat to the confidentiality and integrity of affected systems. Understanding its implications is vital for effective remediation.
Technical Details of CVE-2021-22547
This section provides in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability in the Google Cloud IoT Device SDK for Embedded C enables buffer overrun attacks, potentially compromising system integrity and confidentiality.
Affected Systems and Versions
The affected product is the Google Cloud IoT Device SDK for Embedded C with versions up to and including 1.0.2. Users are advised to update to version 1.0.3 or higher to mitigate the risk.
Exploitation Mechanism
By exploiting the inadequate length check in the calloc() implementation, attackers can manipulate memory objects to gain unauthorized access, highlighting the critical nature of this vulnerability.
Mitigation and Prevention
This section outlines essential steps to mitigate the risks associated with CVE-2021-22547.
Immediate Steps to Take
Immediate actions include upgrading the Google Cloud IoT Device SDK for Embedded C to version 1.0.3 or above to address the buffer overrun vulnerability and enhance system security.
Long-Term Security Practices
Implementing secure coding practices, regular security audits, and staying informed about potential vulnerabilities are key to enhancing long-term system security.
Patching and Updates
Regularly applying security patches and updates provided by vendors is essential to prevent exploitation of known vulnerabilities and ensure system resilience.