CVE-2017-18079 : Exploit Details and Defense Strategies

In the Linux kernel prior to version 4.12.4, a vulnerability exists in the drivers/input/serio/i8042.c file, potentially enabling attackers to cause a denial of service attack, system crash, and null pointer dereference. This CVE was published on January 29, 2018.

Understanding CVE-2017-18079

This CVE affects the Linux kernel prior to version 4.12.4 and poses a risk of denial of service attacks and system crashes.

What is CVE-2017-18079?

The vulnerability in the Linux kernel allows attackers to trigger a denial of service attack, leading to a system crash and null pointer dereference. The issue arises due to the port->exists value changing after validation.

The Impact of CVE-2017-18079

The consequences of this vulnerability include the potential for a denial of service attack, system crashes, and other unspecified impacts due to the validation issue.

Technical Details of CVE-2017-18079

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in drivers/input/serio/i8042.c in the Linux kernel before 4.12.4 allows for a denial of service attack and system crash due to the port->exists value changing post-validation.

Affected Systems and Versions

Affected Systems: Linux kernel versions prior to 4.12.4
Affected Component: drivers/input/serio/i8042.c

Exploitation Mechanism

The vulnerability can be exploited by attackers to cause a denial of service attack by manipulating the port->exists value.

Mitigation and Prevention

Protecting systems from CVE-2017-18079 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to a patched version of the Linux kernel (4.12.4 or newer)
Monitor vendor advisories for patches and updates

Long-Term Security Practices

Regularly update and patch the Linux kernel
Implement security best practices to prevent and detect denial of service attacks

Patching and Updates

Apply patches provided by the Linux kernel maintainers
Stay informed about security updates and advisories from relevant vendors