CVE-2022-23635

mediumpriority · track · 31EPSS 0.017 · 77 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.66% (77th) EPSS

CVSS 5 · medium

Is it mine?

50 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedservicemesh-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-0:2.1.2-4.el8.src as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-0:2.1.2-4.el8.x86_64 as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-cni-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-cni-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-cni-0:2.1.2-4.el8.x86_64 as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-agent-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-agent-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-agent-0:2.1.2-4.el8.x86_64 as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-discovery-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-discovery-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275
Fixedservicemesh-pilot-discovery-0:2.1.2-4.el8.x86_64 as a component of OpenShift Service Mesh 2.1redhat_csaf
The OpenShift Service Mesh Release Notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/v2x/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2022:1275

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Red Hat Product Security US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1284USprimaryCWE-1284USCWE-287USCWE-287USCWE-287US

affected products (50)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat OpenShift Container Platform 4all versionscert_bundDEcpe:/a:redhat:openshift:container_platform_4
istio istio≤ < 1.11.7enisa_euvdEU
istio istio1.12.0, → 1.12.4enisa_euvdEU
istio istio1.13.0, → 1.13.1enisa_euvdEU
istio istio< 1.11.7nvdUScpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
istio istio1.12.0 → 1.12.4nvdUScpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
istio istio1.13.0 → 1.13.1nvdUScpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
Go istio.io/istio< 1.11.7osvUSpkg:golang/istio.io/istio
Go istio.io/istio1.12.0 → 1.12.4osvUSpkg:golang/istio.io/istio
Go istio.io/istio1.13.0 → 1.13.1osvUSpkg:golang/istio.io/istio
servicemesh-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS
servicemesh-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS
servicemesh-0:2.1.2-4.el8.src as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS
servicemesh-0:2.1.2-4.el8.x86_64 as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS
servicemesh-cni-0:2.1.2-4.el8.ppc64le as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS
servicemesh-cni-0:2.1.2-4.el8.s390x as a component of OpenShift Service Mesh 2.1all versionsfixedredhat_csafUS

showing 20 of 50

advisories (3)

Vendor and ecosystem advisories describing this.

RHSA-2022:1275Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.1.2 security update2022-04-07csaf · redhat_csafUS
Red Hat OpenShift Service Mesh 2.1.2 Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2022-0970Red Hat OpenShift: Mehrere SchwachstellenDeutsch2022-04-07csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial-of-Service-Zustand zu verursachen und Sicherheitsmaßnahmen zu umgehen.
GHSA-856q-xv3c-7f2fUnauthenticated control plane denial of service attack in Istio2022-02-23ghsa · osvUS
### Impact The Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. ### Patches - Istio 1.13.1 and above - Istio 1.12.4 and above - Istio 1.11.7 and above ### Workarounds There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent. ### References More details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2022-003) ### For more information If you have any questions or comments about this advisory, please email us at [istio-security-vulnerability-reports@googlegroups.com](mailto:istio-security-vulnerability-reports@googlegroups.com)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv redhat_csaf NVD CVE.org MITRE

published 2022-02-22modified 2026-06-17

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+503 more

references (14)

External citations — patches, advisories, analysis.

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