CVE-2018-5953 : Security Advisory and Response
Learn about CVE-2018-5953, a Linux kernel vulnerability allowing local users to access confidential address information. Find mitigation steps and patching details here.
This CVE-2018-5953 article provides insights into a vulnerability in the Linux kernel that allows local users to access confidential address information.
Understanding CVE-2018-5953
What is CVE-2018-5953?
The vulnerability in the Linux kernel up to version 4.14.14 enables local users to obtain sensitive address information by reading dmesg data through a specific function call.
The Impact of CVE-2018-5953
The vulnerability allows unauthorized access to confidential address information, potentially leading to security breaches and data leaks.
Technical Details of CVE-2018-5953
Vulnerability Description
The issue arises from the swiotlb_print_info function in lib/swiotlb.c, allowing local users to read dmesg data and access sensitive address information.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to Linux kernel version 4.14.14
Exploitation Mechanism
- Local users can exploit the vulnerability by invoking a specific printk call from the swiotlb_print_info function.
Mitigation and Prevention
Immediate Steps to Take
- Monitor and restrict access to dmesg data
- Implement least privilege access controls
- Regularly review and update kernel security configurations
Long-Term Security Practices
- Conduct regular security audits and vulnerability assessments
- Educate users on secure coding practices and kernel security
Patching and Updates
- Apply relevant security patches and updates provided by the Linux kernel maintainers