CVE-2019-13176 Explained : Impact and Mitigation
Discover the impact of CVE-2019-13176 on 3CX Phone system versions 12.5.44178.1002 to 12.5 SP2. Learn about XXE attacks and SSRF risks, along with mitigation steps.
A vulnerability was found in the 3CX Phone system (web) management console versions 12.5.44178.1002 to 12.5 SP2, allowing for XML External Entity (XXE) attacks.
Understanding CVE-2019-13176
This CVE identifies a security flaw in the 3CX Phone system (web) management console that could lead to Server-Side Request Forgery (SSRF) attacks.
What is CVE-2019-13176?
The vulnerability in the Content.MainForm.wgx component of the 3CX Phone system allows attackers to exploit XXE by injecting a specially crafted XML document in the POST data, potentially enabling SSRF attacks.
The Impact of CVE-2019-13176
Exploiting this vulnerability could permit malicious actors to execute SSRF attacks, such as reading local files, initiating outbound HTTP requests, and conducting outbound DNS queries.
Technical Details of CVE-2019-13176
This section delves into the specifics of the vulnerability.
Vulnerability Description
The Content.MainForm.wgx component in 3CX Phone system versions 12.5.44178.1002 to 12.5 SP2 is susceptible to XXE attacks through crafted XML documents in POST data, facilitating SSRF exploitation.
Affected Systems and Versions
- Product: 3CX Phone system (web) management console
- Versions: 12.5.44178.1002 to 12.5 SP2
Exploitation Mechanism
The vulnerability arises from the improper handling of XML input, allowing threat actors to manipulate data and perform SSRF attacks.
Mitigation and Prevention
Protecting systems from CVE-2019-13176 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply vendor-supplied patches promptly to address the vulnerability.
- Monitor network traffic for any suspicious activity that could indicate SSRF attempts.
Long-Term Security Practices
- Implement strict input validation to prevent XXE vulnerabilities.
- Educate users on the risks of opening untrusted files or links that could trigger SSRF attacks.
Patching and Updates
Regularly update and patch the 3CX Phone system to mitigate known vulnerabilities and enhance overall security.