CVE-2024-23324

Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata

Description

Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections. Downstream clients can force invalid gRPC requests to be sent to ext_authz, circumventing ext_authz checks when failure_mode_allow is set to true. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory github.com Vendor Advisory github.com
Affected: envoyproxy envoy
Published at:
Updated at:

References

Link Tags
https://github.com/envoyproxy/envoy/security/advisories/GHSA-gq3v-vvhj-96j6 vendor advisory
https://github.com/envoyproxy/envoy/commit/29989f6cc8bfd8cd2ffcb7c42711eb02c7a5168a patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2024-23324?
CVE-2024-23324 has been scored as a high severity vulnerability.
How to fix CVE-2024-23324?
To fix CVE-2024-23324, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-23324 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-23324 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-23324?
CVE-2024-23324 affects envoyproxy envoy.
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