CVE-2019-6802 : Vulnerability Insights and Analysis

This CVE-2019-6802 article provides insights into a CRLF Injection vulnerability in pypiserver version 1.2.5 and earlier, potentially leading to cross-site scripting attacks.

Understanding CVE-2019-6802

This CVE involves a security issue in pypiserver that could allow attackers to manipulate HTTP headers, leading to potential XSS attacks.

What is CVE-2019-6802?

The pypiserver version 1.2.5 and below are susceptible to CRLF Injection, enabling attackers to modify HTTP headers and potentially execute cross-site scripting attacks by inserting %0d%0a in a URI.

The Impact of CVE-2019-6802

This vulnerability could be exploited by malicious actors to manipulate HTTP headers and launch cross-site scripting attacks, compromising the security and integrity of the affected systems.

Technical Details of CVE-2019-6802

This section delves into the technical aspects of the CVE.

Vulnerability Description

The CRLF Injection vulnerability in pypiserver version 1.2.5 and earlier allows attackers to manipulate HTTP headers, potentially leading to cross-site scripting attacks by inserting %0d%0a in a URI.

Affected Systems and Versions

Product: pypiserver
Vendor: N/A
Versions affected: 1.2.5 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting %0d%0a in a URI, enabling them to manipulate HTTP headers and potentially execute cross-site scripting attacks.

Mitigation and Prevention

Protecting systems from CVE-2019-6802 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update pypiserver to a patched version that addresses the CRLF Injection vulnerability.
Monitor and filter user inputs to prevent malicious characters like %0d%0a.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement input validation mechanisms to sanitize user inputs and prevent injection attacks.

Patching and Updates

Ensure that all systems running pypiserver are updated to a secure version that mitigates the CRLF Injection vulnerability.