Learn about CVE-2022-1259 impacting Undertow, allowing attackers to disrupt flow control over HTTP/2, potentially leading to denial of service. Find mitigation steps here.
A flaw was found in Undertow related to flow control handling by the browser over HTTP/2, potentially leading to a denial of service in the server. This vulnerability is a result of an incomplete fix for a previous CVE-2021-3629.
Understanding CVE-2022-1259
In this section, we will explore the details surrounding CVE-2022-1259, including its impact, technical aspects, and mitigation strategies.
What is CVE-2022-1259?
CVE-2022-1259 describes a vulnerability in Undertow that could be exploited by a malicious actor to disrupt the flow control mechanism over HTTP/2, causing excessive consumption of resources or a denial of service condition.
The Impact of CVE-2022-1259
The impact of this vulnerability is significant as it could potentially allow an attacker to degrade the performance of a server using Undertow, leading to service disruptions and resource exhaustion.
Technical Details of CVE-2022-1259
Let's delve into the specifics of CVE-2022-1259, including the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability stems from a flaw in flow control handling by the browser over HTTP/2, resulting in excessive resource consumption or denial of service within Undertow.
Affected Systems and Versions
Undertow versions 2.3.0.Final, 2.2.17.SP1, 2.2.20.Final, and 2.2.19.SP1 are confirmed to be affected by CVE-2022-1259.
Exploitation Mechanism
Malicious actors can exploit this vulnerability by manipulating the flow control mechanism over HTTP/2 in a way that causes undue strain on the server, potentially leading to service disruptions.
Mitigation and Prevention
In this section, we will discuss immediate steps to take to mitigate the risks posed by CVE-2022-1259 and establish long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Stay informed about security advisories and updates from the Undertow project to apply patches promptly and keep systems secure.