CVE-2017-5576 Explained : Impact and Mitigation

CVE-2017-5576, published on January 24, 2017, addresses an integer overflow vulnerability in the VideoCore DRM driver in the Linux kernel prior to version 4.9.7. This vulnerability could allow local users to trigger a denial of service or potentially exploit other consequences by manipulating a size value in a specific ioctl call.

Understanding CVE-2017-5576

This CVE entry pertains to a specific vulnerability in the VideoCore DRM driver in the Linux kernel.

What is CVE-2017-5576?

The vulnerability in the VideoCore DRM driver in the Linux kernel before version 4.9.7 involves an integer overflow issue in the vc4_get_bcl function, located in drivers/gpu/drm/vc4/vc4_gem.c. By exploiting this flaw, local users could potentially cause a denial of service or other unspecified impacts.

The Impact of CVE-2017-5576

The vulnerability could be exploited by local users to trigger a denial of service or potentially exploit other undisclosed consequences by employing a manipulated size value in a specific ioctl call.

Technical Details of CVE-2017-5576

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability is an integer overflow in the vc4_get_bcl function in the VideoCore DRM driver in the Linux kernel before version 4.9.7.

Affected Systems and Versions

The Linux kernel versions prior to 4.9.7 are affected.

Exploitation Mechanism

Local users can exploit the vulnerability by using a manipulated size value in a VC4_SUBMIT_CL ioctl call.

Mitigation and Prevention

Protecting systems from CVE-2017-5576 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Linux kernel to version 4.9.7 or later to mitigate the vulnerability.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch the Linux kernel and other software components to prevent vulnerabilities.
Implement least privilege access controls to limit the impact of potential exploits.

Patching and Updates

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