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github.com/kumahq/kuma affected by CVE-2023-44487

High severity GitHub Reviewed Published Oct 12, 2023 in kumahq/kuma • Updated Oct 19, 2023

Package

gomod github.com/kumahq/kuma (Go)

Affected versions

>= 2.4.0, < 2.4.3
>= 2.3.0, < 2.3.3
>= 2.2.0, < 2.2.4
>= 2.1.0, < 2.1.8
< 2.0.8

Patched versions

2.4.3
2.3.3
2.2.4
2.1.8
2.0.8

Description

Impact

Envoy and Go HTTP/2 protocol stack is vulnerable to the "Rapid Reset" class of exploits, which send a sequence of HEADERS frames optionally followed by RST_STREAM frames.

This can be exercised if you use the builtin gateway and receive untrusted http2 traffic.

Patches

kumahq/kuma#8023
kumahq/kuma#8001
kumahq/kuma#8034

Workarounds

Disable http2 on the gateway listener with a MeshProxyPatch or ProxyTemplate.

References

GHSA-qppj-fm5r-hxr3
golang/go#63417
GHSA-jhv4-f7mr-xx76
https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack
https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/?sf269548684=1
https://www.envoyproxy.io/docs/envoy/latest/configuration/best_practices/edge

References

@lahabana lahabana published to kumahq/kuma Oct 12, 2023
Published to the GitHub Advisory Database Oct 17, 2023
Reviewed Oct 17, 2023
Last updated Oct 19, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

Weaknesses

No CWEs

CVE ID

No known CVE

GHSA ID

GHSA-9wmc-rg4h-28wv

Source code

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