CVE-2017-1000371 Explained : Impact and Mitigation

This CVE-2017-1000371 article provides insights into a vulnerability in the Linux Kernel related to the offset2lib patch.

Understanding CVE-2017-1000371

This CVE involves a specific vulnerability in the Linux Kernel version 4.11.5 that affects i386 based systems.

What is CVE-2017-1000371?

The offset2lib patch in the Linux Kernel has a vulnerability where, if certain conditions are met, an attacker can jump over the stack guard page due to the stack growing downwards to a critical address.

The Impact of CVE-2017-1000371

This vulnerability poses a security risk by allowing attackers to potentially bypass stack protections on affected systems.

Technical Details of CVE-2017-1000371

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises when RLIMIT_STACK is set to RLIM_INFINITY, and a specific memory allocation causes the stack to grow downwards to a critical address, enabling attackers to jump over the stack guard page.

Affected Systems and Versions

Affected System: Linux Kernel version 4.11.5
Affected Architecture: i386 based systems

Exploitation Mechanism

The exploitation involves manipulating memory allocation to create a scenario where the stack guard page can be bypassed.

Mitigation and Prevention

To address CVE-2017-1000371, follow these mitigation strategies:

Immediate Steps to Take

Apply relevant patches and updates provided by the Linux Kernel maintainers.
Monitor system logs for any suspicious activities that could indicate exploitation attempts.
Implement strict memory allocation controls to prevent stack manipulation.

Long-Term Security Practices

Regularly update the Linux Kernel to the latest stable version to ensure all security patches are applied.
Conduct security audits and penetration testing to identify and address potential vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from Linux Kernel maintainers and promptly apply recommended patches to mitigate known vulnerabilities.