CVE-2019-19083 : Security Advisory and Response

A vulnerability in the Linux kernel before version 5.3.8 allows attackers to exploit memory leaks in specific functions, leading to a denial of service due to excessive memory consumption.

Understanding CVE-2019-19083

This CVE identifies a vulnerability in the Linux kernel affecting certain *clock_source_create() functions.

What is CVE-2019-19083?

The vulnerability in the Linux kernel before version 5.3.8 allows attackers to exploit memory leaks in the *clock_source_create() functions, leading to a denial of service by causing excessive memory consumption.

The Impact of CVE-2019-19083

The vulnerability, identified as CID-055e547478a1, affects various clock source creation functions in the Linux kernel, potentially allowing attackers to disrupt system operations through memory leaks.

Technical Details of CVE-2019-19083

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to exploit memory leaks in the *clock_source_create() functions in the Linux kernel before version 5.3.8, specifically in drivers/gpu/drm/amd/display/dc.

Affected Systems and Versions

The vulnerability impacts the Linux kernel before version 5.3.8.
Affected functions include dce112_clock_source_create(), dce100_clock_source_create(), dcn10_clock_source_create(), dcn20_clock_source_create(), dce120_clock_source_create(), dce110_clock_source_create(), and dce80_clock_source_create().

Exploitation Mechanism

Attackers can exploit memory leaks in the affected functions to cause a denial of service by consuming excessive memory.

Mitigation and Prevention

Protecting systems from CVE-2019-19083 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Linux kernel to version 5.3.8 or newer to mitigate the vulnerability.
Monitor system memory consumption for any unusual spikes that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch the Linux kernel and related components to prevent vulnerabilities.
Implement proper access controls and monitoring to detect and respond to potential attacks.
Stay informed about security advisories and updates from relevant vendors.
Conduct regular security assessments and audits to identify and address potential weaknesses.

Patching and Updates

Apply patches provided by the Linux kernel maintainers to address the vulnerability.
Stay informed about security updates and advisories from trusted sources to ensure timely protection.