CVE-2017-20005 : What You Need to Know

NGINX before version 1.13.6 is susceptible to a buffer overflow vulnerability affecting years with more than four digits. The issue arises when a file's modification date is set to 1969, triggering an integer overflow or a false future date when accessed by the autoindex module.

Understanding CVE-2017-20005

This CVE pertains to a specific buffer overflow vulnerability in NGINX versions prior to 1.13.6, impacting systems with extended year formats.

What is CVE-2017-20005?

The vulnerability in NGINX versions earlier than 1.13.6 allows for a buffer overflow when encountering file modification dates with more than four digits, leading to potential security risks.

The Impact of CVE-2017-20005

The presence of this vulnerability poses a risk of exploitation by malicious actors, potentially compromising the integrity and security of affected systems.

Technical Details of CVE-2017-20005

NGINX CVE-2017-20005 involves specific technical aspects that are crucial to understanding its implications.

Vulnerability Description

The vulnerability is triggered by setting a file modification date to 1969, causing an integer overflow or a falsified future date when interacted with by the autoindex module.

Affected Systems and Versions

NGINX versions earlier than 1.13.6
Systems with file modification dates exceeding four digits

Exploitation Mechanism

The vulnerability is exploited by manipulating file modification dates to trigger an integer overflow, potentially leading to unauthorized access or system compromise.

Mitigation and Prevention

Addressing CVE-2017-20005 requires immediate actions and long-term security measures to safeguard systems.

Immediate Steps to Take

Update NGINX to version 1.13.6 or newer to mitigate the vulnerability
Monitor system logs for any suspicious activities related to file modification dates

Long-Term Security Practices

Regularly apply security patches and updates to NGINX and other software components
Conduct periodic security audits to identify and address potential vulnerabilities

Patching and Updates

Stay informed about security advisories and patches released by NGINX
Implement a robust patch management process to promptly apply updates and fixes