CVE-2017-8068 : Security Advisory and Response
Discover the impact of CVE-2017-8068 on Linux kernel 4.9.x. Learn about the denial of service risk for local users due to misusing the CONFIG_VMAP_STACK option.
This CVE involves a vulnerability in the Linux kernel version 4.9.x before 4.9.11, specifically in the file drivers/net/usb/pegasus.c. The issue arises when interacting with the CONFIG_VMAP_STACK option, potentially leading to a denial of service for local users.
Understanding CVE-2017-8068
This section provides insights into the nature and impact of the CVE-2017-8068 vulnerability.
What is CVE-2017-8068?
The vulnerability in drivers/net/usb/pegasus.c in the Linux kernel 4.9.x before 4.9.11 allows local users to trigger a denial of service, such as system crashes or memory corruption, by misusing the CONFIG_VMAP_STACK option. Exploiting multiple virtual pages for a DMA scatterlist can exacerbate the impact.
The Impact of CVE-2017-8068
The vulnerability can result in a denial of service, potentially causing system crashes, memory corruption, and other unspecified impacts. Local users can exploit this issue, affecting the stability and integrity of the system.
Technical Details of CVE-2017-8068
Explore the technical aspects of the CVE-2017-8068 vulnerability.
Vulnerability Description
The Linux kernel 4.9.x before 4.9.11 mishandles interactions with the CONFIG_VMAP_STACK option in drivers/net/usb/pegasus.c, enabling local users to disrupt system operations and potentially cause memory corruption.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: Linux kernel 4.9.x before 4.9.11
Exploitation Mechanism
The vulnerability can be exploited by local users leveraging the CONFIG_VMAP_STACK option and utilizing multiple virtual pages for a DMA scatterlist, leading to a denial of service.
Mitigation and Prevention
Learn how to mitigate the risks associated with CVE-2017-8068.
Immediate Steps to Take
- Apply the official patch provided by the Linux kernel maintainers.
- Monitor official sources for updates and security advisories.
- Restrict system access to trusted users to minimize the risk of exploitation.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement least privilege principles to limit user access rights.
- Conduct security training for users to raise awareness of potential threats.
Patching and Updates
Ensure timely patching and updates for the Linux kernel to address vulnerabilities and enhance system security.