CVE-2017-7472 : Vulnerability Insights and Analysis

In versions of the Linux kernel prior to 4.10.13, a vulnerability in the KEYS subsystem allows local users to launch a denial of service attack by consuming excessive memory.

Understanding CVE-2017-7472

In this CVE, a flaw in the Linux kernel's KEYS subsystem can be exploited by local users to cause a denial of service by consuming excessive memory.

What is CVE-2017-7472?

The vulnerability in the KEYS subsystem of the Linux kernel before version 4.10.13 allows local users to trigger a denial of service attack by using a series of specific keyctl_set_reqkey_keyring calls.

The Impact of CVE-2017-7472

The vulnerability can be exploited by local users to exhaust kernel memory, leading to a denial of service condition on the affected system.

Technical Details of CVE-2017-7472

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in the KEYS subsystem of the Linux kernel allows local users to consume excessive memory, resulting in a denial of service condition.

Affected Systems and Versions

Product: Linux kernel before 4.10.13
Versions: Linux kernel before 4.10.13

Exploitation Mechanism

The vulnerability can be exploited by local users through a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls.

Mitigation and Prevention

Protecting systems from CVE-2017-7472 requires specific actions.

Immediate Steps to Take

Apply patches provided by the Linux kernel maintainers promptly.
Monitor system resources for any unusual memory consumption.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly update the Linux kernel to the latest stable version.

Patching and Updates

Update the Linux kernel to version 4.10.13 or newer to mitigate the vulnerability effectively.