CVE-2017-6505 : What You Need to Know
Learn about CVE-2017-6505 affecting QEMU, allowing local users to create a denial of service attack by causing an infinite loop. Find mitigation steps and update information here.
CVE-2017-6505 was published on March 15, 2017, and affects QEMU, specifically in the hw/usb/hcd-ohci.c file. This vulnerability allows local users in the guest operating system to create a denial of service attack by causing an infinite loop.
Understanding CVE-2017-6505
This CVE involves a vulnerability in the ohci_service_ed_list function within QEMU, allowing for a denial of service attack.
What is CVE-2017-6505?
The ohci_service_ed_list function in QEMU before version 2.9.0 enables local guest OS users to trigger a denial of service via manipulation of link endpoint list descriptors.
The Impact of CVE-2017-6505
The vulnerability permits local users to execute a denial of service attack by inducing an infinite loop, distinct from CVE-2017-9330.
Technical Details of CVE-2017-6505
This section provides in-depth technical insights into the vulnerability.
Vulnerability Description
The ohci_service_ed_list function in hw/usb/hcd-ohci.c in QEMU allows local guest OS users to cause a denial of service through an infinite loop.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions: n/a
Exploitation Mechanism
The attack vectors involve manipulating the number of link endpoint list descriptors.
Mitigation and Prevention
Protecting systems from CVE-2017-6505 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security updates promptly
- Monitor vendor advisories for patches
- Implement least privilege access controls
Long-Term Security Practices
- Regularly update and patch software
- Conduct security training for users
- Employ network segmentation and isolation
Patching and Updates
Ensure that QEMU is updated to version 2.9.0 or later to mitigate the vulnerability.