CVE-2017-7294 : Exploit Details and Defense Strategies
Learn about CVE-2017-7294, a Linux kernel vulnerability enabling local users to trigger an integer overflow and out-of-bounds write, potentially leading to denial of service or privilege escalation. Find mitigation steps and patching recommendations here.
A vulnerability in the Linux kernel through version 4.10.6 could allow local users to trigger an integer overflow and out-of-bounds write, potentially leading to a denial of service or privilege escalation.
Understanding CVE-2017-7294
What is CVE-2017-7294?
The vmw_surface_define_ioctl function in the Linux kernel does not properly validate certain levels data, enabling local users to exploit an integer overflow and out-of-bounds write through a crafted ioctl call for a /dev/dri/renderD* device.
The Impact of CVE-2017-7294
This vulnerability may result in a denial of service, causing system hang or crash. Additionally, it could allow attackers to escalate privileges if exploited maliciously.
Technical Details of CVE-2017-7294
Vulnerability Description
Insufficient validation in the vmw_surface_define_ioctl function of the Linux kernel allows for an integer overflow and out-of-bounds write.
Affected Systems and Versions
- Linux kernel through version 4.10.6
Exploitation Mechanism
The vulnerability can be exploited by local users through a crafted ioctl call for a /dev/dri/renderD* device.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by the Linux kernel maintainers
- Monitor vendor advisories for updates and apply them promptly
Long-Term Security Practices
- Regularly update and patch the Linux kernel and associated components
- Implement the principle of least privilege to limit potential attack surfaces
Patching and Updates
- Keep the Linux kernel up to date with the latest security patches and fixes