CVE-2019-9513 : Security Advisory and Response

Certain implementations of HTTP/2 may be susceptible to resource loops, potentially leading to a denial of service situation. The attacker can exploit this vulnerability by generating numerous request streams and manipulating their priority, causing disruption to the priority tree and excessive CPU consumption.

Understanding CVE-2019-9513

This CVE involves vulnerabilities in certain HTTP/2 implementations that can be exploited to create resource loops, resulting in denial of service.

What is CVE-2019-9513?

CVE-2019-9513 refers to a vulnerability in HTTP/2 implementations that allows attackers to create resource loops, leading to a denial of service scenario.

The Impact of CVE-2019-9513

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: High
Scope: Unchanged
No impact on Confidentiality or Integrity
No privileges required
No user interaction needed

Technical Details of CVE-2019-9513

Certain details about the vulnerability and its implications.

Vulnerability Description

HTTP/2 implementations vulnerable to resource loops
Attackers can disrupt priority trees and cause excessive CPU usage

Affected Systems and Versions

Product: n/a
Vendor: n/a
Affected Version: n/a

Exploitation Mechanism

Attacker generates multiple request streams
Continuously changes stream priorities to disrupt the priority tree
Results in high CPU consumption

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-9513.

Immediate Steps to Take

Update affected HTTP/2 implementations
Monitor and restrict excessive request streams
Implement network-level protections

Long-Term Security Practices

Regularly update and patch HTTP/2 implementations
Conduct security audits and vulnerability assessments
Educate users and administrators on secure practices

Patching and Updates

Apply patches provided by vendors
Stay informed about security advisories and updates
Implement secure coding practices and configurations