CVE-2018-0494 : Exploit Details and Defense Strategies

CVE-2018-0494 was published on May 6, 2018, and affects the WGet tool. The vulnerability allows for a cookie injection issue, potentially exploitable through specific sequences in continuation lines.

Understanding CVE-2018-0494

This CVE pertains to a cookie injection vulnerability in GNU Wget before version 1.19.5, specifically in the resp_new function within http.c.

What is CVE-2018-0494?

CVE-2018-0494 is a security vulnerability in GNU Wget that could lead to a cookie injection problem, enabling potential exploitation through specific character sequences.

The Impact of CVE-2018-0494

The vulnerability in GNU Wget could allow malicious actors to inject cookies, potentially leading to unauthorized access or other security breaches.

Technical Details of CVE-2018-0494

This section delves into the specifics of the vulnerability.

Vulnerability Description

The resp_new function in http.c of GNU Wget before 1.19.5 is susceptible to a cookie injection issue due to certain character sequences in continuation lines.

Affected Systems and Versions

Product: WGet
Vendor: n/a
Versions Affected: WGet

Exploitation Mechanism

The vulnerability can be exploited through the presence of specific character sequences, particularly \r\n, in continuation lines.

Mitigation and Prevention

To address CVE-2018-0494, consider the following steps:

Immediate Steps to Take

Update GNU Wget to version 1.19.5 or later to mitigate the vulnerability.
Monitor for any unauthorized access or unusual activities on affected systems.

Long-Term Security Practices

Regularly update software and apply security patches to prevent known vulnerabilities.
Implement network monitoring and access controls to enhance overall security posture.

Patching and Updates

Stay informed about security advisories and updates from relevant vendors to address vulnerabilities promptly.