Resource exhaustion in Calico Typha
CVE-2023-41378
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Calico Typha — versions v3.26.0, 0
- Tigera Calico Cloud
- Tigera Calico Enterprise
- Tigera Calico OS
- Tigera Typha — versions v3.17.0, v3.16.0, 0
Weakness classification (CWE)
References
- www.tigera.io/security-bulletins-tta-2023-001/ (release-notes, vendor-advisory, Vendor Advisory)
- github.com/projectcalico/calico/pull/7908 (issue-tracking, Issue Tracking)
- github.com/projectcalico/calico/pull/7993 (Patch, patch, Issue Tracking)
Frequently asked questions
- What is CVE-2023-41378?
- CVE-2023-41378 is a high-severity vulnerability in Calico Typha, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-11-06.
- How severe is CVE-2023-41378?
- High severity. CVSS v3 base score is 7.5 out of 10.