CVE-2019-10718 : Security Advisory and Response

BlogEngine.NET versions prior to 3.3.7.0 are vulnerable to XML External Entity Blind Injection through the pingback.axd file and PingbackHandler.cs file.

Understanding CVE-2019-10718

What is CVE-2019-10718?

BlogEngine.NET 3.3.7.0 and earlier versions are susceptible to XML External Entity Blind Injection, particularly associated with the pingback.axd and PingbackHandler.cs files.

The Impact of CVE-2019-10718

This vulnerability could allow attackers to exploit XML External Entity (XXE) injection, potentially leading to sensitive data exposure or server-side request forgery (SSRF) attacks.

Technical Details of CVE-2019-10718

Vulnerability Description

The vulnerability in BlogEngine.NET versions prior to 3.3.7.0 allows for XML External Entity Blind Injection, primarily linked to the pingback.axd and BlogEngine.Core/Web/HttpHandlers/PingbackHandler.cs files.

Affected Systems and Versions

Product: BlogEngine.NET
Vendor: N/A
Versions affected: All versions prior to 3.3.7.0

Exploitation Mechanism

The vulnerability can be exploited through crafted XML payloads to trigger XXE attacks via the pingback.axd and PingbackHandler.cs files.

Mitigation and Prevention

Immediate Steps to Take

Update BlogEngine.NET to version 3.3.7.0 or later to mitigate the vulnerability.
Disable the pingback feature if not essential for the application.

Long-Term Security Practices

Regularly monitor and apply security patches for BlogEngine.NET.
Implement input validation to prevent malicious XML input.

Patching and Updates

Ensure timely installation of security updates and patches provided by BlogEngine.NET to address known vulnerabilities.