CVE-2024-45403
3.7 · LOWOverview
CVE-2024-45403 is a low-severity vulnerability affecting dena h2o. It was published on October 11, 2024 and has a CVSS 3.1 base score of 3.7 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.
Remediation
Check the references section for vendor advisories and patches from dena. Update h2o to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| dena | h2o | >= 2024-06-18, < 2024-09-04 | Affected |
Frequently Asked Questions
What is CVE-2024-45403?
CVE-2024-45403 is a low-severity vulnerability affecting dena h2o. It was published on October 11, 2024 and has a CVSS 3.1 base score of 3.7 (LOW).
How severe is CVE-2024-45403?
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2024-45403?
Check the references section for vendor advisories and patches from dena. Update h2o to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2024-45403?
CyberStrike's AI-powered security agents can automatically detect CVE-2024-45403 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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