CVE-2020-10739

mediumpriority · track · 31EPSS 0.024 · 84 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.39% (84th) EPSS

CVSS 5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

Istio 1.4.x before 1.4.9 and Istio 1.5.x before 1.5.4 contain the following vulnerability when telemetry v2 is enabled: by sending a specially crafted packet, an attacker could trigger a Null Pointer Exception resulting in a Denial of Service. This could be sent to the ingress gateway or a sidecar, triggering a null pointer exception which results in a denial of service. This also affects servicemesh-proxy where a null pointer exception flaw was found in servicemesh-proxy. When running Telemetry v2 (not on by default in version 1.4.x), an attacker could send a specially crafted packet to the ingress gateway or proxy sidecar, triggering a denial of service.

remediations

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

A vendor fix is available.

Fixedservicemesh-proxy-0:1.1.2-2.el8.src as a component of OpenShift Service Mesh 1.1redhat_csaf
The OpenShift Service Mesh release notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2020:2148
Fixedservicemesh-proxy-0:1.1.2-2.el8.x86_64 as a component of OpenShift Service Mesh 1.1redhat_csaf
The OpenShift Service Mesh release notes provide information on the features and known issues: https://docs.openshift.com/container-platform/latest/service_mesh/servicemesh-release-notes.html
https://access.redhat.com/errata/RHSA-2020:2148
Workaroundservicemesh-proxy-0:1.1.2-2.el8.src as a component of OpenShift Service Mesh 1.1redhat_csaf
Leave the telemetry reporting in OpenShift ServiceMesh set to the default component Mixer, leaving Telemetry V2 as disabled.
Workaroundservicemesh-proxy-0:1.1.2-2.el8.x86_64 as a component of OpenShift Service Mesh 1.1redhat_csaf
Leave the telemetry reporting in OpenShift ServiceMesh set to the default component Mixer, leaving Telemetry V2 as disabled.

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 · secalert@redhat.com USexploitability 3.9 · impact 3.6

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-476US

affected products (6)

Products and version ranges known to be affected.

istio.io istio/envoy1.4.0, → 1.4.9enisa_euvdEU
istio.io istio/envoy1.5.0, → 1.5.4enisa_euvdEU
istio istio1.4.0 → 1.4.9nvdUScpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
istio istio1.5.0 → 1.5.4nvdUScpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
servicemesh-proxy-0:1.1.2-2.el8.src as a component of OpenShift Service Mesh 1.1all versionsfixedredhat_csafUS
servicemesh-proxy-0:1.1.2-2.el8.x86_64 as a component of OpenShift Service Mesh 1.1all versionsfixedredhat_csafUS

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2020:2148Red Hat Security Advisory: Red Hat OpenShift Service Mesh 1.1.2 Service Mesh Proxy security update2020-05-13csaf · redhat_csafUS
An update for servicemesh-proxy is now available for OpenShift Service Mesh 1.1. 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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2020-06-02modified 2026-06-17

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references (13)

External citations — patches, advisories, analysis.

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