Vulnerability Details : 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 category: Denial of service
Products affected by CVE-2023-41378
- cpe:2.3:a:tigera:calico_enterprise:*:*:*:*:*:*:*:*
- cpe:2.3:a:tigera:calico_enterprise:*:*:*:*:*:*:*:*
- cpe:2.3:a:tigera:calico_enterprise:*:*:*:*:*:*:*:*
- cpe:2.3:o:tigera:calico_os:*:*:*:*:*:*:*:*
- cpe:2.3:o:tigera:calico_os:*:*:*:*:*:*:*:*
- cpe:2.3:a:tigera:calico_cloud:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-41378
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-41378
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
Tigera, Inc. |
CWE ids for CVE-2023-41378
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: psirt@tigera.io (Secondary)
-
The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.Assigned by: psirt@tigera.io (Secondary)
-
The product does not handle or incorrectly handles an exceptional condition.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-41378
-
https://www.tigera.io/security-bulletins-tta-2023-001/
Page not found | TigeraVendor Advisory
-
https://github.com/projectcalico/calico/pull/7993
Move TLS handshake to per-connection goroutine by fasaxc · Pull Request #7993 · projectcalico/calico · GitHubIssue Tracking;Patch
-
https://github.com/projectcalico/calico/pull/7908
calico-typha hangs during unclean client TLS handshake · Issue #7908 · projectcalico/calico · GitHubIssue Tracking
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