CVE-2017-2670 : What You Need to Know

Undertow prior to version 1.3.28 is vulnerable to a Denial of Service (DoS) attack due to an issue in the Websocket server. This CVE has a CVSS base score of 7.5.

Understanding CVE-2017-2670

Undertow version 1.3.28 is affected by a vulnerability that can lead to a DoS attack.

What is CVE-2017-2670?

A flaw in Undertow allows the Websocket server to enter an infinite loop on each IO thread during a non-clean TCP close, resulting in a DoS condition.

The Impact of CVE-2017-2670

The vulnerability poses a high availability impact, potentially allowing attackers to disrupt services.

Technical Details of CVE-2017-2670

Undertow version 1.3.28 is susceptible to a DoS attack due to the Websocket server issue.

Vulnerability Description

The Websocket server in Undertow can enter an infinite loop on each IO thread, causing a DoS condition upon non-clean TCP close.

Affected Systems and Versions

Product: Undertow
Vendor: [UNKNOWN]
Version: 1.3.28.Final-redhat-4

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Unchanged
CVSS Score: 7.5 (High)

Mitigation and Prevention

To address CVE-2017-2670, follow these mitigation strategies:

Immediate Steps to Take

Update Undertow to version 1.3.28 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network monitoring and intrusion detection systems.

Patching and Updates

Apply the latest patches and security updates provided by the vendor to prevent exploitation.