What’s Vulnerable › Vulnerabilities

CVE-2020-13597: Calico nodes IPv6 traffic redirection from route advertisment

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-03 · updated 2026-06-17
• Weakness: CWE-201

Description

Clusters using Calico (version 3.14.0 and below), Calico Enterprise (version 2.8.2 and below), may be vulnerable to information disclosure if IPv6 is enabled but unused. A compromised pod with sufficient privilege is able to reconfigure the node’s IPv6 interface due to the node accepting route advertisement by default, allowing the attacker to redirect full or partial network traffic from the node to the compromised pod.

Affected products

• Projectcalico Calico: through 2.6.2; through 3.8.8; from 2.7.0 through 2.7.4; from 2.8.0 through 2.8.2; from 3.9.0 through 3.9.5; from 3.10.0 through 3.10.3

References

• https://github.com/kubernetes/kubernetes/issues/91507
• https://groups.google.com/forum/#%21topic/kubernetes-security-announce/BMb_6ICCfp8
• https://www.projectcalico.org/security-bulletins/
• https://github.com/kubernetes/kubernetes/issues/91507
• https://groups.google.com/forum/#%21topic/kubernetes-security-announce/BMb_6ICCfp8
• https://www.projectcalico.org/security-bulletins/

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