CVE-2017-5956 Explained : Impact and Mitigation

CVE-2017-5956 was published on March 20, 2017, with a public disclosure date of February 10, 2017. The vulnerability affects virglrenderer versions prior to 0.6.0, allowing local guest OS users to trigger a denial of service through out-of-bounds array access.

Understanding CVE-2017-5956

This CVE entry describes a vulnerability in virglrenderer that can lead to a denial of service attack.

What is CVE-2017-5956?

The vulnerability in virglrenderer versions before 0.6.0 enables local guest OS users to cause a denial of service by exploiting vectors related to the vertex_buffer_index.

The Impact of CVE-2017-5956

The vulnerability allows attackers to crash the QEMU process by triggering out-of-bounds array access, potentially disrupting system operations.

Technical Details of CVE-2017-5956

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vrend_draw_vbo function in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service through out-of-bounds array access and crashing the QEMU process.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions Affected: Prior to 0.6.0

Exploitation Mechanism

The vulnerability is exploited by leveraging vectors related to the vertex_buffer_index, enabling attackers to trigger a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2017-5956 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update virglrenderer to version 0.6.0 or later to mitigate the vulnerability.
Monitor for any unusual system crashes or out-of-bounds access attempts.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement least privilege access controls to limit the impact of potential attacks.

Patching and Updates

Ensure that all systems running virglrenderer are updated to version 0.6.0 or above to address the vulnerability.