CVE-2017-11176 Explained : Impact and Mitigation
Learn about CVE-2017-11176, a vulnerability in the Linux kernel up to version 4.11.9 that can lead to denial of service attacks. Find out how to mitigate and prevent exploitation.
In the Linux kernel up to version 4.11.9, a vulnerability exists in the mq_notify function that can lead to a denial of service attack or other unspecified effects when a Netlink socket is closed from user-space.
Understanding CVE-2017-11176
What is CVE-2017-11176?
The vulnerability in the Linux kernel allows attackers to exploit the mq_notify function, potentially causing a denial of service (use-after-free) or other impacts.
The Impact of CVE-2017-11176
The vulnerability can be exploited by attackers to initiate a denial of service attack (use-after-free) or potentially have other unspecified effects when a Netlink socket is closed from user-space.
Technical Details of CVE-2017-11176
Vulnerability Description
The mq_notify function in the Linux kernel through version 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic, enabling attackers to cause a denial of service or other unspecified impacts.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited when a Netlink socket is closed from user-space, allowing attackers to trigger a denial of service attack or potentially cause other impacts.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by the Linux kernel maintainers.
- Monitor official sources for updates and security advisories.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement proper access controls and monitoring mechanisms to detect and prevent unauthorized activities.
Patching and Updates
- Stay informed about security updates and apply patches promptly to mitigate the vulnerability.