CVE-2021-1945 : What You Need to Know

This article delves into the details of CVE-2021-1945, a vulnerability affecting a wide range of Qualcomm products.

Understanding CVE-2021-1945

CVE-2021-1945 is a possible out-of-bound read vulnerability due to a lack of length check of Bandwidth-NSS IE in various Qualcomm products.

What is CVE-2021-1945?

The vulnerability allows an attacker to perform a possible out-of-bound read, impacting multiple Qualcomm product lines including Snapdragon Auto, Compute, Connectivity, Consumer IOT, Industrial IOT, Mobile, Voice & Music, and more.

The Impact of CVE-2021-1945

CVE-2021-1945 has a base score of 7.5 (High) according to the CVSS v3.1 scoring system. The attack complexity is low, but the availability impact is high. It does not require any privileges for exploitation.

Technical Details of CVE-2021-1945

This section provides more insight into the vulnerability.

Vulnerability Description

The vulnerability stems from a lack of length check of Bandwidth-NSS IE, potentially leading to an out-of-bound read.

Affected Systems and Versions

Multiple Qualcomm products are affected, including APQ8053, APQ8064AU, AR9380, MSM8953, and many more across various product lines.

Exploitation Mechanism

Attackers exploiting this vulnerability can trigger an out-of-bound read by manipulating the Bandwidth-NSS IE.

Mitigation and Prevention

Here are steps to mitigate the impact of CVE-2021-1945.

Immediate Steps to Take

It is recommended to apply patches provided by Qualcomm as soon as they are available. Additionally, monitoring network traffic for any signs of exploitation is crucial.

Long-Term Security Practices

Regularly updating the software and firmware of Qualcomm devices and maintaining a proactive approach to security can help prevent such vulnerabilities.

Patching and Updates

Qualcomm has released security bulletins, including mitigation details, to address CVE-2021-1945. Stay informed about updates and apply patches promptly.