CVE-2018-11020 : What You Need to Know

Amazon Kindle Fire HD (3rd) Fire OS 4.5.5.3 kernel component is vulnerable to a crash exploit via a specially crafted argument.

Understanding CVE-2018-11020

This CVE involves a vulnerability in the rpmsg_omx.c file of the Amazon Kindle Fire HD (3rd) Fire OS 4.5.5.3 kernel component.

What is CVE-2018-11020?

The vulnerability allows attackers to exploit a kernel crash by injecting a specially crafted argument through an ioctl command on the device file /dev/rpmsg-omx1.

The Impact of CVE-2018-11020

The exploit can lead to a kernel crash, potentially enabling attackers to disrupt device functionality and compromise system integrity.

Technical Details of CVE-2018-11020

This section provides detailed technical insights into the CVE.

Vulnerability Description

The vulnerability in kernel/omap/drivers/rpmsg/rpmsg_omx.c allows attackers to inject a crafted argument via an ioctl command on the device file /dev/rpmsg-omx1, leading to a kernel crash.

Affected Systems and Versions

Product: Amazon Kindle Fire HD (3rd) Fire OS 4.5.5.3
Vendor: Amazon
Version: Not applicable

Exploitation Mechanism

Attackers can exploit the vulnerability by injecting a specially crafted argument through the ioctl command 3221772291 on the device file /dev/rpmsg-omx1.

Mitigation and Prevention

Protecting systems from CVE-2018-11020 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch all software and firmware on devices.
Implement access controls and restrictions to limit potential attack surfaces.

Patching and Updates

Stay informed about security updates and advisories from the vendor.
Ensure timely installation of patches to mitigate the vulnerability.