Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| h2o / h2o | affected < 15ed15a2efb83a77bb4baaa5a119e639c2f6898a |
CWE
CWE-284
References
- https://github.com/h2o/h2o/security/advisories/GHSA-jf2c-xjcp-wg4c
- https://github.com/h2o/h2o/commit/15ed15a2efb83a77bb4baaa5a119e639c2f6898a
- https://h2o.examp1e.net/configure/http3_directives.html
ADP enrichment
No English description supplied.
No references supplied.