CVE-2019-9515 : What You Need to Know
Learn about CVE-2019-9515, a vulnerability in certain HTTP/2 implementations that can lead to denial of service attacks. Find out the impact, affected systems, exploitation details, and mitigation steps.
Certain implementations of HTTP/2 are vulnerable to a settings flood attack, potentially leading to a denial of service.
Understanding CVE-2019-9515
HTTP/2 vulnerability exposing systems to denial of service attacks.
What is CVE-2019-9515?
- Vulnerability in certain HTTP/2 implementations susceptible to settings flooding
- Attack involves overwhelming the target with continuous SETTINGS frames
- Exploitation can lead to excessive CPU or memory usage
The Impact of CVE-2019-9515
- Attack severity varies based on how the system handles data queuing
- Potential for high CPU and memory utilization
Technical Details of CVE-2019-9515
HTTP/2 vulnerability details.
Vulnerability Description
- Vulnerability in HTTP/2 implementations allowing settings flood attacks
Affected Systems and Versions
- Specific implementations of HTTP/2
- No specific product or version mentioned
Exploitation Mechanism
- Attacker sends a stream of SETTINGS frames to overwhelm the target
- Empty SETTINGS frames act like pings, consuming resources
Mitigation and Prevention
Protecting systems from CVE-2019-9515.
Immediate Steps to Take
- Apply patches or updates from relevant vendors
- Monitor network traffic for unusual patterns
- Implement rate limiting for SETTINGS frames
Long-Term Security Practices
- Regularly update and patch software
- Implement network-level protections and monitoring
Patching and Updates
- Check vendor advisories for patches
- Apply updates promptly to mitigate the vulnerability