CVE-2021-35103 : Security Advisory and Response

This CVE involves a possible out-of-bound write vulnerability in multiple Qualcomm Snapdragon products due to improper validation of timer values. The affected products include Snapdragon Auto, Compute, Connectivity, Industrial IoT, Mobile, Wearables, and more.

Understanding CVE-2021-35103

Qualcomm's Snapdragon products are impacted by a security flaw that could result in a high-severity attack. Proper mitigation is crucial to prevent potential exploitation.

What is CVE-2021-35103?

The vulnerability stems from inadequate validation of timer values received from firmware, leading to a potential out-of-bound write issue. Attackers could exploit this flaw to execute arbitrary code or disrupt the affected systems.

The Impact of CVE-2021-35103

With a CVSS base score of 7.8, this vulnerability poses a significant risk to confidentiality, integrity, and availability. Immediate action is necessary to safeguard vulnerable devices.

Technical Details of CVE-2021-35103

The following details provide insight into the specific aspects of the vulnerability.

Vulnerability Description

The flaw arises from improper validation of timer values received from firmware, resulting in an out-of-bound write scenario. This could enable attackers to manipulate system processes and execute malicious code.

Affected Systems and Versions

Qualcomm's Snapdragon Auto, Compute, Connectivity, Industrial IoT, Mobile, Wearables, and other related products are impacted by this vulnerability. A wide range of versions are affected, necessitating comprehensive security measures.

Exploitation Mechanism

Attackers could exploit this vulnerability by sending crafted timer values to the affected devices, triggering the out-of-bound write condition and potentially gaining control over the system.

Mitigation and Prevention

Addressing CVE-2021-35103 requires immediate action and long-term security practices to protect vulnerable devices.

Immediate Steps to Take

Users and administrators should apply relevant patches and updates provided by Qualcomm to mitigate the vulnerability. Additionally, monitoring for any unusual system behavior is advisable.

Long-Term Security Practices

Implementing strict input validation mechanisms and conducting regular security audits can help prevent similar vulnerabilities in the future. It is essential to stay informed about security bulletins and updates from Qualcomm.

Patching and Updates

Qualcomm has released patches and updates to address CVE-2021-35103. Users are encouraged to promptly install these updates to eliminate the risk of exploitation and enhance the security posture of their devices.