CVE-2019-16200 : What You Need to Know

GNU Serveez up to version 0.2.2 is affected by an information leak vulnerability that can be exploited through an HTTP POST request. The vulnerability lies in the http_cgi_write function, potentially revealing a heap-based buffer over-read in the svz_envblock_add function.

Understanding CVE-2019-16200

This CVE involves an information leak vulnerability in GNU Serveez up to version 0.2.2.

What is CVE-2019-16200?

CVE-2019-16200 is an information leak vulnerability in GNU Serveez up to version 0.2.2. Attackers can exploit this by sending a crafted HTTP POST request.

The Impact of CVE-2019-16200

The vulnerability allows attackers to trigger a heap-based buffer over-read, potentially exposing sensitive information.

Technical Details of CVE-2019-16200

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability in GNU Serveez allows attackers to perform an information leak by manipulating the Content-length header in an HTTP POST request.

Affected Systems and Versions

Affected Version: GNU Serveez up to 0.2.2

Exploitation Mechanism

Attackers send an HTTP POST request to /cgi-bin/reader URI
Include a Content-length header with a large positive value
The value, when converted to a 32-bit binary, results in a negative number
Vulnerability located in http_cgi_write function
Potential exposure of heap-based buffer over-read in svz_envblock_add function

Mitigation and Prevention

Protecting systems from CVE-2019-16200 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches or updates promptly
Monitor network traffic for any suspicious activity
Implement strict input validation mechanisms

Long-Term Security Practices

Regular security assessments and audits
Employee training on identifying and reporting security issues
Implement network segmentation to contain potential attacks

Patching and Updates

Check for patches or updates from GNU Serveez
Apply security patches as soon as they are released