CVE-2019-12454 : Exploit Details and Defense Strategies

A problem has been found in the function wcd9335_codec_enable_dec in the file wcd9335.c within the Linux kernel up to version 5.1.5. This CVE has been disputed by the vendor, claiming it is not a vulnerability due to the specific context of the code.

Understanding CVE-2019-12454

This CVE involves a disputed vulnerability in the Linux kernel affecting the wcd9335_codec_enable_dec function.

What is CVE-2019-12454?

The issue lies in the use of kstrndup instead of kmemdup_nul in the specified function, potentially enabling attackers to exploit the system, although the exact impact remains unspecified.

The Impact of CVE-2019-12454

The impact of this vulnerability is not fully known due to the dispute between the discoverer and the vendor. However, it could potentially lead to security risks if exploited.

Technical Details of CVE-2019-12454

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in wcd9335_codec_enable_dec allows attackers to exploit the Linux kernel through the use of kstrndup instead of kmemdup_nul, potentially leading to unspecified impacts.

Affected Systems and Versions

Affected system: Linux kernel up to version 5.1.5
The specific affected versions are not detailed due to the disputed nature of the vulnerability.

Exploitation Mechanism

Attackers can potentially exploit the vulnerability by leveraging the incorrect usage of kstrndup in the code.

Mitigation and Prevention

To address and prevent the potential risks associated with CVE-2019-12454, consider the following steps:

Immediate Steps to Take

Stay informed about any updates or resolutions provided by the vendor.
Implement additional security measures to mitigate potential exploitation.

Long-Term Security Practices

Regularly monitor for security advisories and updates related to the Linux kernel.
Conduct thorough code reviews and audits to identify and address similar vulnerabilities.

Patching and Updates

Apply patches or updates released by the Linux kernel maintainers to address the vulnerability.