Learn about CVE-2017-15274, a vulnerability in the Linux kernel keyctl system call that allows local users to trigger a denial of service. Find out how to mitigate this flaw and protect your system.
In the Linux kernel prior to version 4.11.5, a vulnerability exists in the keyctl system call functionality in the security/keys/keyctl.c file. This flaw allows local users to trigger a denial of service by exploiting a specific scenario, resulting in a NULL pointer dereference and OOPS condition.
Understanding CVE-2017-15274
This CVE entry highlights a vulnerability in the Linux kernel that can be exploited by local users to cause a denial of service.
What is CVE-2017-15274?
The vulnerability in the keyctl system call functionality in the Linux kernel arises from improper handling of a NULL payload combined with a non-zero length value. This flaw enables local users to exploit the system, leading to a denial of service.
The Impact of CVE-2017-15274
The vulnerability allows local users to trigger a denial of service, resulting in a NULL pointer dereference and OOPS condition. It is crucial to address this issue promptly to prevent system instability.
Technical Details of CVE-2017-15274
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in security/keys/keyctl.c in the Linux kernel before 4.11.5 allows local users to cause a denial of service via a crafted add_key or keyctl system call.
Affected Systems and Versions
Exploitation Mechanism
The vulnerability can be exploited by local users through a specific scenario involving a NULL payload and a non-zero length value.
Mitigation and Prevention
Protecting systems from CVE-2017-15274 requires immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Regularly check for security advisories and updates from Linux kernel vendors to ensure that the system is protected against known vulnerabilities.