CVE-2017-6355 : What You Need to Know
Learn about CVE-2017-6355, an integer overflow vulnerability in virglrenderer before 0.6.0, allowing local guest OS users to cause a denial of service by providing manipulated values.
A vulnerability related to integer overflow has been identified in the vrend_create_shader function within the vrend_renderer.c file of virglrenderer, version 0.6.0 and earlier. This flaw could be exploited by local users with guest operating system privileges to disrupt the system, potentially resulting in a crash of the affected process. The attack occurs when the malicious user supplies manipulated pkt_length and offlen values, leading to an out-of-bounds access.
Understanding CVE-2017-6355
This CVE-2017-6355 vulnerability in virglrenderer before version 0.6.0 involves an integer overflow issue that can be triggered by local guest OS users.
What is CVE-2017-6355?
CVE-2017-6355 is an integer overflow vulnerability in the vrend_create_shader function of virglrenderer, allowing local guest OS users to cause a denial of service (process crash) by providing crafted pkt_length and offlen values.
The Impact of CVE-2017-6355
The exploitation of this vulnerability could lead to a system crash, potentially affecting the stability and availability of the affected process.
Technical Details of CVE-2017-6355
This section provides more in-depth technical details about the CVE-2017-6355 vulnerability.
Vulnerability Description
The vulnerability lies in the vrend_create_shader function in vrend_renderer.c in virglrenderer before version 0.6.0, enabling local guest OS users to trigger a denial of service through manipulated pkt_length and offlen values.
Affected Systems and Versions
- Product: virglrenderer
- Vendor: N/A
- Versions affected: 0.6.0 and earlier
Exploitation Mechanism
The attack occurs when a malicious user with guest OS privileges supplies manipulated pkt_length and offlen values, leading to an out-of-bounds access.
Mitigation and Prevention
To address CVE-2017-6355, consider the following mitigation strategies:
Immediate Steps to Take
- Apply the vendor-provided patch or update to version 0.6.0 or later.
- Restrict guest OS user privileges to minimize the impact of potential exploitation.
Long-Term Security Practices
- Regularly monitor and update software components to address known vulnerabilities.
- Implement least privilege access controls to limit the capabilities of local users.
Patching and Updates
Ensure timely patching and updates for virglrenderer to mitigate the risk of exploitation.