CVE-2017-1000211 Explained : Impact and Mitigation

Lynx before version 2.8.9dev.16 is susceptible to a use after free vulnerability in the HTML parser, leading to memory disclosure. The vulnerability arises from the HTML_put_string() function's ability to append a chunk onto itself.

Understanding CVE-2017-1000211

This CVE entry highlights a critical vulnerability in Lynx that could result in memory disclosure.

What is CVE-2017-1000211?

CVE-2017-1000211 is a use after free vulnerability in Lynx's HTML parser, allowing attackers to disclose memory contents by exploiting the HTML_put_string() function.

The Impact of CVE-2017-1000211

The vulnerability could be exploited by malicious actors to access sensitive information stored in the system's memory, potentially leading to unauthorized disclosure of data.

Technical Details of CVE-2017-1000211

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

Lynx version 2.8.9dev.16 and earlier versions are prone to a use after free vulnerability in the HTML parser, enabling memory disclosure through the HTML_put_string() function.

Affected Systems and Versions

Lynx versions prior to 2.8.9dev.16

Exploitation Mechanism

The vulnerability can be exploited by manipulating the HTML_put_string() function to append a chunk onto itself, leading to memory disclosure.

Mitigation and Prevention

Protecting systems from CVE-2017-1000211 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Lynx to version 2.8.9dev.16 or newer to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement proper input validation and secure coding practices to prevent memory-related vulnerabilities.

Patching and Updates

Ensure timely installation of security updates and patches to address known vulnerabilities in Lynx.