CVE-2019-19059 : Exploit Details and Defense Strategies

The iwl_pcie_ctxt_info_gen3_init() function in the Linux kernel is vulnerable to multiple memory leaks, potentially leading to a denial of service attack due to high memory consumption.

Understanding CVE-2019-19059

This CVE involves a vulnerability in the iwl_pcie_ctxt_info_gen3_init() function in the Linux kernel, affecting versions up to 5.3.11.

What is CVE-2019-19059?

The vulnerability allows attackers to trigger memory leaks, leading to a denial of service attack by causing failures in specific functions.

The Impact of CVE-2019-19059

The vulnerability can result in a denial of service attack due to high memory consumption, impacting the stability and performance of affected systems.

Technical Details of CVE-2019-19059

The technical aspects of the vulnerability provide insight into its nature and potential risks.

Vulnerability Description

The iwl_pcie_ctxt_info_gen3_init() function in the Linux kernel is prone to multiple memory leaks, which can be exploited by attackers to initiate a denial of service attack.

Affected Systems and Versions

The vulnerability affects versions of the Linux kernel up to 5.3.11.

Exploitation Mechanism

Attackers can exploit the vulnerability by triggering failures in the iwl_pcie_init_fw_sec() or dma_alloc_coherent() functions.

Mitigation and Prevention

Protecting systems from CVE-2019-19059 requires immediate actions and long-term security measures.

Immediate Steps to Take

Monitor for security advisories and patches related to the Linux kernel.
Implement network segmentation to limit the impact of potential attacks.
Consider applying temporary mitigations recommended by security experts.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.
Educate users and IT staff on best practices for secure system configuration.

Patching and Updates

Apply patches provided by the Linux kernel maintainers promptly to address the vulnerability and enhance system security.