CVE-2017-15102 : Vulnerability Insights and Analysis

CVE-2017-15102, published on November 15, 2017, addresses a vulnerability in the Linux kernel through version 4.9-rc1. The flaw allows local users with physical access to the system to elevate their privileges by inserting a specially crafted USB device.

Understanding CVE-2017-15102

This CVE entry pertains to a vulnerability in the tower_probe function within the Linux kernel, specifically affecting versions prior to 4.8.1.

What is CVE-2017-15102?

The vulnerability in the tower_probe function in the Linux kernel allows nearby individuals with physical access to the system to exploit a write-what-where condition after a race condition and a NULL pointer dereference, enabling them to escalate their privileges.

The Impact of CVE-2017-15102

The vulnerability poses a security risk as it allows unauthorized users to gain elevated privileges on the affected system, potentially leading to unauthorized access and control.

Technical Details of CVE-2017-15102

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The tower_probe function in drivers/usb/misc/legousbtower.c in the Linux kernel before 4.8.1 allows local users to gain privileges by exploiting a write-what-where condition following a race condition and a NULL pointer dereference.

Affected Systems and Versions

Product: Linux kernel through version 4.9-rc1
Vendor: N/A

Exploitation Mechanism

The vulnerability can be exploited by physically proximate attackers who insert a specially crafted USB device, triggering the write-what-where condition after a race condition and NULL pointer dereference.

Mitigation and Prevention

Protecting systems from CVE-2017-15102 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply relevant patches and updates provided by the Linux kernel maintainers.
Restrict physical access to systems to prevent unauthorized USB device insertion.

Long-Term Security Practices

Implement strict access control policies to limit physical access to critical systems.
Regularly monitor and audit USB device usage on sensitive machines.

Patching and Updates

Regularly check for security advisories and updates from Linux kernel vendors to patch known vulnerabilities and enhance system security.