CVE-2019-5303 : Security Advisory and Response

Some Huawei smartphones have two denial of service vulnerabilities that can be exploited by attackers sending specially crafted TD-SCDMA messages. The affected products and versions are detailed below.

Understanding CVE-2019-5303

This CVE involves denial of service vulnerabilities on various Huawei smartphones due to insufficient validation of specific values in incoming messages.

What is CVE-2019-5303?

The vulnerabilities allow attackers to disrupt the normal operation of affected Huawei smartphones by sending malicious TD-SCDMA messages.

The Impact of CVE-2019-5303

The vulnerabilities can lead to abnormal behavior in the affected devices, potentially causing service disruptions and impacting user experience.

Technical Details of CVE-2019-5303

The vulnerability details, affected systems, and exploitation mechanisms are outlined below.

Vulnerability Description

Insufficient validation of specific values in incoming TD-SCDMA messages can trigger abnormal behavior in Huawei smartphones.

Affected Systems and Versions

ALP-AL00B: earlier than 9.1.0.333(C00E333R2P1T8)
ALP-L09: earlier than 9.1.0.300(C432E4R1P9T8)
ALP-L29: earlier than 9.1.0.315(C636E5R1P13T8)
BLA-L29C: Multiple versions affected
and more...

Exploitation Mechanism

Attackers exploit the vulnerabilities by sending specially crafted TD-SCDMA messages from rogue base stations to the targeted Huawei devices.

Mitigation and Prevention

To address CVE-2019-5303, follow these mitigation strategies:

Immediate Steps to Take

Apply security patches provided by Huawei promptly.
Implement network-level protections to filter out malicious messages.

Long-Term Security Practices

Regularly update device software to the latest versions.
Educate users on identifying and avoiding suspicious messages.

Patching and Updates

Check for and apply security updates released by Huawei to address the vulnerabilities effectively.