HTTP/2 Zero-Day Vulnerability - HTTP/2 Protocol ( CVE-2023-44487 ) #linuxtopic

HTTP/2 Zero-Day Vulnerability - HTTP/2 Protocol ( CVE-2023-44487)

HTTP/2  offers a number of performance improvements over HTTP/1.1, It support for multiplexing with including reduced latency and increased throughput.

However, HTTP/2 also know as for there complexity protocol, and as such, it is not without its vulnerabilities. recently a number of zero-day vulnerabilities have been discovered in HTTP/2 implementations.

What is a zero-day vulnerability?

A zero-day vulnerability is a software vulnerability that is unknown to the vendor of the affected software. so we can say  there is no patch available to fix the vulnerability, and hacker or attackers can exploit it to compromise vulnerable systems.

What are the risks of an HTTP/2 zero-day vulnerability?

It could be exploited by Hecker or attackers to carry out a miscellaneousness of attacks we can include the below one 

1. DoS attacks:  Denial-of-service
2. RCE attacks: Remote code execution
3. Request smuggling attacks

DoS attacks:  Denial-of-service - An attacker could exploit a vulnerability to crash the server or consume the resources, making it unavailable to legitimate users.

RCE attacks: It could allow the hackers/attackers to install the malware and take control of the servers and steal important data. they could exploit a vulnerability to execute arbitrary code on a vulnerable server

Request smuggling attacks: This  type of attacks could allow the attacker  to bypass security mechanisms and access the important data or system functionality

they could exploit a vulnerability to smuggle malicious requests into a server's request queue. 

How can I protect myself from an HTTP/2 zero-day vulnerability?

There are a number of things you can do to protect yourself from an HTTP/2 zero-day vulnerability, 

1 - Keep your software up to date: 

Software vendors regularly release the patches to fix this vulnerabilities and we have to  install these patches as soon as they are available.

2 - Use a web application firewall (WAF): 

Web application firewall can help us to protect our web applications from a miscellaneousness of attacks, including HTTP/2 zero-day vulnerabilities.

3 - Security best practices: 

We should be aware of the risks of HTTP/2 zero-day vulnerabilities and follow the best practices to protect themselves from them. 

4 - Avoid Unknow Links:

Everyone should be aware about risk and  avoid a clicking on suspicious links and opening attachments from unknown senders.

Conclusion

It is a serious threat to web security. By taking the steps outlined above, you can help to protect yourself from these attacks.

Additional tips 

Content security policy (CSP): Use a CSP, it  can help to prevent attackers from injecting malicious code into your web pages.

Reverse proxy: Use a reverse proxy, it  can help to shield your web servers from direct attack.

Web traffic Monitoring: You can identify suspicious activity that may indicate an attack by monitoring your web traffic,

Reference links: Read More..

• Cloudflare: HTTP/2 Rapid Reset: deconstructing the record-breaking attack
• Google: How it works: The novel HTTP/2 ‘Rapid Reset’ DDoS attack
• AWS: CVE-2023-44487 - HTTP/2 Rapid Reset Attack
• NGINX: HTTP/2 Rapid Reset Attack Impacting NGINX Products
• Microsoft Response to Distributed Denial of Service (DDoS) Attacks against HTTP/2
• RedHat: https://access.redhat.com/security/cve/cve-2023-44487

Thanks you !! 

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