Is CVE-2023-41378 in the CISA KEV catalog?

No. CVE-2023-41378 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-41378?

CVE-2023-41378 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2023-41378?

CVE-2023-41378 has an EPSS score of 0.72% (49th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-41378?

Upgrade calico cloud to 18.0.0 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2023-41378

HIGH

7.5

CVSS v3

NVD

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.

CWE-400Resource Exhaustion CWE-703 CWE-755

How to fix

Remediation Available

calico cloudNVD

Affected:< 18.0.0Fixed in:18.0.0CVE-2023-41378derived from NVD

calico enterpriseNVD

Affected:>= 3.17.0, < 3.17.2Fixed in:3.17.2CVE-2023-41378derived from NVD

calico osNVD

Affected:>= 3.26.0, < 3.26.3Fixed in:3.26.3CVE-2023-41378derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.72%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

tigera.io

Issue Tracking1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.