Calico Typha denial of service vulnerability
High severity
GitHub Reviewed
Published
Nov 6, 2023
to the GitHub Advisory Database
•
Updated Nov 14, 2023
Package
Affected versions
>= 3.26.0, < 3.26.3
<= 3.25.1
Patched versions
3.26.3
Description
Published by the National Vulnerability Database
Nov 6, 2023
Published to the GitHub Advisory Database
Nov 6, 2023
Reviewed
Nov 8, 2023
Last updated
Nov 14, 2023
In certain conditions for Calico Typha (v3.26.2, v3.25.1 and below), and Calico Enterprise Typha (v3.17.1, v3.16.3, v3.15.3 and below), a client TLS handshake can block the Calico Typha server indefinitely, resulting in denial of service. The TLS Handshake() call is performed inside the main server handle for loop without any timeout allowing an unclean TLS handshake to block the main loop indefinitely while other connections will be idle waiting for that handshake to finish.
References