CVE-2017-8831 Explained : Impact and Mitigation
Learn about CVE-2017-8831, a Linux kernel vulnerability allowing local users to cause a denial of service. Find out the impacted systems, exploitation details, and mitigation steps.
CVE-2017-8831 was published on May 8, 2017, and affects the Linux kernel up to version 4.11.5. This vulnerability in the saa7164_bus_get function can be exploited by local users to cause a denial of service through out-of-bounds array access.
Understanding CVE-2017-8831
This CVE entry highlights a vulnerability in the Linux kernel that could lead to a denial of service attack.
What is CVE-2017-8831?
The saa7164_bus_get function in the Linux kernel through version 4.11.5 allows local users to trigger a denial of service or potentially other impacts by modifying a specific sequence-number value, creating a "double fetch" vulnerability.
The Impact of CVE-2017-8831
The exploitation of this vulnerability can result in a denial of service attack through out-of-bounds array access. Additionally, if the sequence-number value is altered, it may lead to unspecified further consequences.
Technical Details of CVE-2017-8831
This section provides more technical insights into the vulnerability.
Vulnerability Description
The saa7164_bus_get function in drivers/media/pci/saa7164/saa7164-bus.c in the Linux kernel up to version 4.11.5 allows local users to cause a denial of service or other unspecified impacts through out-of-bounds array access.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to Linux kernel version 4.11.5
Exploitation Mechanism
The vulnerability can be exploited by local users to trigger a denial of service by manipulating a specific sequence-number value, resulting in a "double fetch" vulnerability.
Mitigation and Prevention
To address CVE-2017-8831, consider the following mitigation strategies:
Immediate Steps to Take
- Apply the necessary security updates provided by the Linux distribution.
- Monitor for any unusual system behavior that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version to mitigate known vulnerabilities.
- Implement the principle of least privilege to restrict user access and minimize the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories and patches released by the Linux distribution maintainers.
- Promptly apply patches and updates to ensure the system is protected against known vulnerabilities.