CVE-2017-12196 Explained : Impact and Mitigation

Undertow software versions 1.4.18.SP1, 2.0.2.Final, and 1.4.24.Final are vulnerable to a flaw in Digest authentication, allowing attackers to perform MITM attacks.

Understanding CVE-2017-12196

This CVE identifies a security vulnerability in the Undertow software that could lead to unauthorized access and MITM attacks.

What is CVE-2017-12196?

Prior to versions 1.4.18.SP1, 2.0.2.Final, and 1.4.24.Final, a vulnerability in Undertow allows attackers to exploit Digest authentication, gaining unauthorized access to server content.

The Impact of CVE-2017-12196

CVSS Base Score: 4.8 (Medium Severity)
Attack Vector: Network
Confidentiality Impact: High
Attack Complexity: High
User Interaction: Required
This vulnerability could result in MITM attacks and unauthorized access to server content.

Technical Details of CVE-2017-12196

Undertow software versions 1.4.18.SP1, 2.0.2.Final, and 1.4.24.Final are affected by this vulnerability.

Vulnerability Description

When using Digest authentication, Undertow fails to verify if the URI value in the Authorization header matches the URI in the HTTP request line, enabling attackers to exploit this flaw.

Affected Systems and Versions

Affected Versions:
Undertow 1.4.18.SP1
Undertow 2.0.2.Final
Undertow 1.4.24.Final

Exploitation Mechanism

Attackers can leverage this vulnerability to conduct MITM attacks and gain unauthorized access to specific server content.

Mitigation and Prevention

To address CVE-2017-12196, follow these steps:

Immediate Steps to Take

Update Undertow to versions 1.4.18.SP1, 2.0.2.Final, or 1.4.24.Final.
Disable Digest authentication if not required.

Long-Term Security Practices

Regularly monitor for security advisories and updates.
Implement strong authentication mechanisms and encryption protocols.

Patching and Updates

Apply security patches provided by Undertow to fix the vulnerability.