CVE-2023-41378

HIGH EPSS 49.4%
Published Nov 6, 20232y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 6, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
49.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 3

CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-703
CWE-755

Affected Products 6

VendorProductVersionRange
tigeracalico_cloud* <18.0.0
tigeracalico_enterprise* <3.15.4
tigeracalico_enterprise*≥3.16.0  –  <3.16.4
tigeracalico_enterprise*≥3.17.0  –  <3.17.2
tigeracalico_os* <3.25.2
tigeracalico_os*≥3.26.0  –  <3.26.3

References 3

  • github.com https://github.com/projectcalico/calico/pull/7908
    Issue Tracking
  • github.com https://github.com/projectcalico/calico/pull/7993
    Issue TrackingPatch
  • tigera.io https://www.tigera.io/security-bulletins-tta-2023-001/
    Vendor Advisory

Remediation

  • github.com https://github.com/projectcalico/calico/pull/7993
    Issue TrackingPatch