CVE-2019-20202 : Vulnerability Insights and Analysis

A flaw in versions 0.8.3 through 0.8.6 of ezXML leads to a segmentation fault due to incorrect memory handling.

Understanding CVE-2019-20202

This CVE identifies a vulnerability in ezXML versions 0.8.3 through 0.8.6 that can result in a segmentation fault.

What is CVE-2019-20202?

The flaw occurs in the ezxml_char_content() function, which incorrectly handles memory allocation, leading to a segmentation fault.

The Impact of CVE-2019-20202

The vulnerability can be exploited to cause a denial of service (DoS) condition or potentially execute arbitrary code on the affected system.

Technical Details of CVE-2019-20202

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises from ezxml_char_content() attempting to use realloc on an unallocated block, resulting in an incorrect free operation and a segmentation fault.

Affected Systems and Versions

Versions 0.8.3 through 0.8.6 of ezXML are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious input that triggers the ezxml_char_content() function, leading to memory corruption and a segmentation fault.

Mitigation and Prevention

Protecting systems from CVE-2019-20202 requires immediate actions and long-term security measures.

Immediate Steps to Take

Consider upgrading to a patched version of ezXML if available.
Implement input validation to prevent malicious input from reaching the vulnerable function.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Conduct security audits and code reviews to identify and address potential memory-related issues.

Patching and Updates

Stay informed about security updates for ezXML and apply patches promptly to mitigate the risk of exploitation.