CVE-2022-41717 : Vulnerability Insights and Analysis
Understand the impact of CVE-2022-41717 allowing attackers to trigger memory growth in Go servers handling HTTP/2 requests. Learn about affected systems, exploitation, and mitigation steps.
An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. Read on to understand the impact, technical details, and mitigation steps for CVE-2022-41717.
Understanding CVE-2022-41717
This section will provide insight into the discovered vulnerability in net/http and golang.org/x/net/http2.
What is CVE-2022-41717?
CVE-2022-41717 allows an attacker to trigger excessive memory growth in a Go server that accepts HTTP/2 requests. By sending large keys, attackers can cause the server to allocate around 64 MiB per open connection.
The Impact of CVE-2022-41717
The vulnerability presents a risk of uncontrolled resource consumption, classified under CWE-400, making it a critical issue for affected systems and versions.
Technical Details of CVE-2022-41717
Explore the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability arises in the handling of HTTP header keys in server connections, leading to unbounded memory allocation upon receiving oversized key inputs.
Affected Systems and Versions
The Go standard library's net/http up to version 1.18.9 and golang.org/x/net/http2 up to version 0.4.0 are susceptible to this memory growth issue.
Exploitation Mechanism
Attackers exploit the server's cache of HTTP header keys by sending exceptionally large keys, triggering excessive memory allocation per connection.
Mitigation and Prevention
Learn the necessary steps to address and prevent exploits of CVE-2022-41717.
Immediate Steps to Take
Users should update affected versions of net/http and golang.org/x/net/http2 to patched releases, minimizing the risk of memory growth attacks.
Long-Term Security Practices
Implementing secure coding practices, input validation, and regular security audits can help fortify systems against similar resource consumption vulnerabilities.
Patching and Updates
Timely application of vendor-released security patches is crucial to remediate CVE-2022-41717 and maintain system security.