Home/CVE/Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections
CVE

CVE-2024-23324

Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections

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.

HIGH · CVSS 8.6 EPSS 0.00036
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

4
envoyproxy envoy>= 1.26.0 and < 1.26.7
envoyproxy envoy>= 1.27.0 and < 1.27.3
envoyproxy envoy>= 1.28.0 and < 1.28.1
envoyproxy envoy>= 1.29.0 and < 1.29.1
▣

Scoring & Timeline

8.6
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Feb 2024 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/envoyproxy/envoy/commit/29989f6cc8bfd8cd2ffcb7c42711eb02c7a5168aPatchVendor Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-gq3v-vvhj-96j6Vendor Advisory
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