CVE-2023-41378

Calico Typha hangs during unclean TLS handshake

State: Published
Severity: 7.5 High
Published: Nov 6, 2023
Updated: Sep 5, 2024
Reserved: Aug 29, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Tigera

Weaknesses

CWE-400 Uncontrolled Resource Consumption
CWE-703 Improper Check or Handling of Exceptional Conditions

Affected Products

Product	Versions
TyphaCalico	v3.26.0 through v3.26.2Affected v3.25.1 and earlierAffected
TyphaTigera	v3.17.0 through v3.17.1Affected v3.16.0 through v3.16.3Affected v3.15.3 and earlierAffected

References

https://www.tigera.io/security-bulletins-tta-2023-001/vendor-advisoryrelease-notes
https://github.com/projectcalico/calico/pull/7908issue-tracking
https://github.com/projectcalico/calico/pull/7993patch

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