CVE-2023-41378CWE-400CWE-703

Calico Typha hangs during unclean TLS handshake

High · published November 6, 2023

CVSS v3.1
7.5
EPSS
1%
Percentile
53.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00723 · 53.5th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-703 · Improper Check or Handling of Exceptional Conditions
Published
2023-11-06T15:00Z
EPSS history
Timeline
  • 06 NOV 15:00Z
    Calico Typha hangs during unclean TLS handshake
    cvelistv5