CVE-2018-19047 : Vulnerability Insights and Analysis
Learn about CVE-2018-19047 involving mPDF up to version 7.1.6, allowing SSRF attacks through HTML injection. Discover mitigation steps and long-term security practices.
CVE-2018-19047, involving mPDF up to version 7.1.6, presents a vulnerability that can lead to SSRF when utilized as a web application accepting any HTML input. The maintainer disputes this vulnerability, emphasizing the importance of proper HTML sanitization.
Understanding CVE-2018-19047
mPDF through version 7.1.6 is susceptible to SSRF attacks when deployed as a web application that accepts arbitrary HTML.
What is CVE-2018-19047?
This CVE refers to a security vulnerability in mPDF versions up to 7.1.6 that can result in SSRF when the software is used to process HTML input.
The Impact of CVE-2018-19047
The vulnerability allows attackers to trigger SSRF by injecting specific substrings, potentially leading to unauthorized access to internal resources.
Technical Details of CVE-2018-19047
mPDF up to version 7.1.6 is affected by a vulnerability that enables SSRF attacks.
Vulnerability Description
The flaw allows malicious actors to exploit SSRF by injecting a specific substring that triggers a call to the getImage function in Image/ImageProcessor.php.
Affected Systems and Versions
- Product: mPDF
- Vendor: Not applicable
- Versions: Up to 7.1.6
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting a '<img src="http://192.168' substring, which then calls the getImage function in Image/ImageProcessor.php.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2018-19047.
Immediate Steps to Take
- Ensure proper sanitization of HTML inputs to prevent SSRF attacks.
- Regularly monitor and update mPDF to the latest secure version.
Long-Term Security Practices
- Implement strict input validation mechanisms to prevent malicious injections.
- Conduct regular security audits and penetration testing to identify and address vulnerabilities.
Patching and Updates
- Apply patches and updates provided by mPDF promptly to address security vulnerabilities and enhance protection against SSRF attacks.