Vulnerabilities > CVE-2023-41378 - Improper Handling of Exceptional Conditions vulnerability in Tigera Calico Cloud, Calico Enterprise and Calico OS
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 9 | |
| OS | 7 |