CVE-2023-21639 : Exploit Details and Defense Strategies

This CVE-2023-21639 was published on July 4, 2023, by Qualcomm, Inc. It involves memory corruption in Audio due to processing sva_model_serializer with a memory size passed by HIDL client.

Understanding CVE-2023-21639

This vulnerability affects multiple versions and platforms under the Snapdragon product line by Qualcomm, Inc.

What is CVE-2023-21639?

The vulnerability stems from a buffer copy operation without checking the size of the input in the Audio component.

The Impact of CVE-2023-21639

The impact is classified as low complexity with a medium severity base score of 6.7 according to the CVSS v3.1 metrics. It has a high availability, confidentiality, and integrity impact with high privileges required for exploitation.

Technical Details of CVE-2023-21639

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability involves memory corruption in Audio while processing sva_model_serializer using memory size passed by the HIDL client.

Affected Systems and Versions

The following Qualcomm Snapdragon products and versions are affected:

Snapdragon Auto
Snapdragon Mobile
Snapdragon Wearables
AQT1000
FastConnect 6200
QCA6420
QCA6430
SA4150P
SA4155P
SA6155P
SA8155P
SA8195P
SD855
Snapdragon 855 Mobile Platform
Snapdragon 855+/860 Mobile Platform (SM8150-AC)
Snapdragon W5+ Gen 1 Wearable Platform
SW5100
SW5100P
WCD9341
WCN3980
WCN3988
WSA8810
WSA8815
WSA8830
WSA8835

Exploitation Mechanism

The vulnerability can be exploited locally with no user interaction required but with high privileges.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the impact of CVE-2023-21639.

Immediate Steps to Take

Stay updated with security advisories from Qualcomm.
Implement patches and updates provided by the vendor.
Monitor for any signs of exploitation.

Long-Term Security Practices

Regularly update software and firmware.
Implement network security measures.
Conduct security training for employees on best practices.
Have a response plan in place for security incidents.

Patching and Updates

Qualcomm has released a bulletin addressing the July 2023 security vulnerabilities. Ensure that the affected systems are updated with the latest patches provided by the vendor.