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Fencer Vulns
high 7.4

CVE-2022-21654 json

Incorrect configuration handling allows TLS session re-use without re-validation in Envoy

published 2022-02-22 4 y ago modified 2026-09-08 2 mo ago also BIT-envoy-2022-21654 , EUVD-2022-26872 , GHSA-5j4x-g36v-m283

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

Envoy is an open source edge and service proxy, designed for cloud-native applications. Envoy's tls allows re-use when some cert validation settings have changed from their default configuration. The only workaround for this issue is to ensure that default tls settings are used. Users are advised to upgrade.

Patch / fix

  • bitnami envoy 1.18.6, 1.19.3, 1.20.2, 1.21.1
  • envoyproxy envoy 1.18.6, 1.19.3, 1.20.2, 1.21.1
  • kiali service mesh 2.0 v1.24.7.redhat1-1.el8
  • servicemesh service mesh 2.0 2.0.9-3.el8
  • servicemesh-mixc service mesh 2.0 2.0.9-3.el8
  • servicemesh-mixs service mesh 2.0 2.0.9-3.el8
  • servicemesh-proxy service mesh 2.0 2.0.9-3.el8
  • servicemesh-istioctl service mesh 2.0 2.0.9-3.el8
  • servicemesh-prometheus service mesh 2.0 2.14.0-16.el8.1
  • servicemesh-pilot-agent service mesh 2.0 2.0.9-3.el8

red hat advisories RHSA-2022:1276RHSA-2022:1275

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-21654 updated cvss 9.4

envoy: Incorrect configuration handling allows mTLS session re-use without re-validation

  • Red Hat OpenShift Service Mesh 2.0 servicemesh-proxy 2.0.9-3.el8
    fixed: vendor fix RHSA-2022:1276
  • Red Hat OpenShift Service Mesh 2.1 servicemesh-proxy 2.1.2-4.el8, servicemesh-proxy-wasm 2.1.2-4.el8
    fixed: vendor fix RHSA-2022:1275
  • Red Hat OpenShift Service Mesh 2.0 servicemesh 2.0.9-3.el8, kiali v1.24.7.redhat1-1.el8, servicemesh-cni 2.0.9-3.el8, servicemesh-mixc 2.0.9-3.el8, servicemesh-mixs 2.0.9-3.el8, servicemesh-istioctl 2.0.9-3.el8, +4 more Red Hat OpenShift Service Mesh 2.1 servicemesh 2.1.2-4.el8, servicemesh-cni 2.1.2-4.el8, servicemesh-operator 2.1.2-4.el8, servicemesh-ratelimit 2.1.2-4.el8, servicemesh-pilot-agent 2.1.2-4.el8, servicemesh-prometheus 2.23.0-5.el8, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami envoy
>=1.7.0, <1.18.6
>=1.19.0, <1.19.3
>=1.20.0, <1.20.2
>=1.21.0, <1.21.1
1.18.6
1.19.3
1.20.2
1.21.1

Affected products

  • envoyproxy envoy

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.