Vulnerability Description
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP requests conveyed by packets with a spoofed source address. This behavior allows attackers on the network to execute HTTP requests from addresses that are otherwise rejected by the address-based access control. The vulnerability has been addressed in commit 15ed15a. Users may disable the use of TCP FastOpen and QUIC to mitigate the issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dena | H2O | < 2024-10-10 |
Related Weaknesses (CWE)
References
- https://github.com/h2o/h2o/commit/15ed15a2efb83a77bb4baaa5a119e639c2f6898aPatch
- https://github.com/h2o/h2o/security/advisories/GHSA-jf2c-xjcp-wg4cVendor Advisory
- https://h2o.examp1e.net/configure/http3_directives.htmlProduct
FAQ
What is CVE-2024-45397?
CVE-2024-45397 is a vulnerability with a CVSS score of 5.9 (MEDIUM). h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based acc...
How severe is CVE-2024-45397?
CVE-2024-45397 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-45397?
Check the references section above for vendor advisories and patch information. Affected products include: Dena H2O.