CVE-2021-1974 : Exploit Details and Defense Strategies
Learn about CVE-2021-1974, a high-severity buffer over-read vulnerability affecting various Qualcomm products. Find mitigation steps and updates from Qualcomm.
This article provides detailed information about CVE-2021-1974, which involves a possible buffer over read vulnerability in various Qualcomm products.
Understanding CVE-2021-1974
CVE-2021-1974 is a security vulnerability found in an array of Qualcomm products, leading to a potential buffer over read situation.
What is CVE-2021-1974?
The vulnerability arises due to the misalignment between the map or unmap length of IPA SMMU and WLAN SMMU in multiple Qualcomm product lines.
The Impact of CVE-2021-1974
With a CVSS base score of 7.5, this high-severity vulnerability can allow attackers to cause a buffer over read situation, potentially resulting in a denial of service.
Technical Details of CVE-2021-1974
The technical details indicate a low complexity network attack vector with a high availability impact. The exploit does not require any special privileges or user interaction.
Vulnerability Description
The vulnerability leads to a potential buffer over read due to misalignment between the map or unmap length of IPA SMMU and WLAN SMMU across multiple Qualcomm product ranges.
Affected Systems and Versions
Several products from Qualcomm, such as Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, and more, are affected by this vulnerability as listed in the references.
Exploitation Mechanism
The exploit leverages the misalignment between key system components, IPA SMMU and WLAN SMMU, to achieve the buffer over read condition.
Mitigation and Prevention
Given the critical nature of this vulnerability, immediate actions need to be taken to secure affected systems and prevent potential attacks.
Immediate Steps to Take
Organizations using the impacted Qualcomm products should apply the necessary security patches and updates provided by Qualcomm.
Long-Term Security Practices
Implement comprehensive security measures such as network segmentation, least privilege access, and regular security assessments to enhance overall system resilience.
Patching and Updates
Regularly check for security bulletins and updates from Qualcomm to stay informed about the latest patches and fixes for CVE-2021-1974.