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Full vulnerability report · 2021
CVE-2020-28852High confidence

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag

n/a · n/a

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2020-28852 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitygolang.org/x/text: Panic in language.ParseAcceptLanguage while processing bcp47 tag
68 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • servicemesh-cni as a component of OpenShift Service Mesh 2.0
  • servicemesh-cni.src as a component of OpenShift Service Mesh 2.0
  • go.src as a component of Red Hat Advanced Cluster Management for Kubernetes 2
  • golang-bin as a component of Red Hat Ceph Storage 2
  • golang-src as a component of Red Hat Ceph Storage 2
  • golang.src as a component of Red Hat Ceph Storage 2
  • golang-bin as a component of Red Hat Ceph Storage 3
  • golang-src as a component of Red Hat Ceph Storage 3
  • golang.src as a component of Red Hat Ceph Storage 3
  • buildah.src as a component of Red Hat Enterprise Linux 7
  • golang as a component of Red Hat Enterprise Linux 7
  • golang-bin as a component of Red Hat Enterprise Linux 7
Summary
A flaw was found in golang.org. In x/text, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag.
Remediation
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
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-21244

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

What

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

Why

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

Why

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Improper Validation of Array Index → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-129 ↗

CWE-129: Improper Validation of Array Index. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-129Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2022-0510IBM DB2: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um Dateien zu manipulieren, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen, willkürlichen Code mit erhöhten Rechten auszuführen, Informationen falsch darzustellen und beliebigen Code auszuführen.

Official advisory
BSI · German · WID-SEC-W-2022-0970Red Hat OpenShift: Mehrere Schwachstellen

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.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-591Multiples vulnérabilités dans les produits IBM

d?id=CVE-2020-10752 Référence CVE CVE-2020-14040 https://www.cve.org/CVERecord?id=CVE-2020-14040 Référence CVE CVE-2020-15106 https://www.cve.org/CVERecord?id=CVE-2020-15106 Référence CVE CVE-2020-15112 https://www.cve.org/CVERecord?id=CVE-2020-15112 Référence CVE CVE-2020-15113 https://www.cve.org/CVERecord?id=CVE-2020-15113 Référence CVE CVE-2020-25704 https://www.cve.org/CVERecord?id=CVE-2020-25704 Référence CVE CVE-2020-26160 https://www.cve.org/CVERecord?id=CVE-2020-26160 Référence CVE CVE-2020-27813 https://www.cve.org/CVERecord?id=CVE-2020-27813 Référence CVE CVE-2020-28851 https://www.cve.org/CVERecord?id=CVE-2020-28851 Référence CVE CVE-2020-28852 https://www.cve.org/CVERecord?id=CVE-2020-28852 Référence CVE CVE-2020-29368 https://www.cve.org/CVERecord?id=CVE-2020-29368 Référence CVE CVE-2020-29652 https://www.cve.org/CVERecord?id=CVE-2020-29652 Référence CVE CVE-2020-36067 https://www.cve.org/CVERecord?id=CVE-2020-36067 Référence CVE CVE-2020-36322 https://www.cve.org/CVERecord?id=CVE-2020-36322 Référence CVE CVE-2020-36385 https://www.cve.org/CVERecord?id=CVE-2020-36385 Référence CVE CVE-2020-7919 https://www.cve.org/CVERecord?id=CVE-2020-7919 Référence CVE CVE-2020-8551 https://www.cve.org/CVERecord?id=CVE-2020-8551 Référence CVE CVE-2020-8552 https://www.cve.org/CVERecord?id=CVE-2

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
servicemesh-cni as a component of OpenShift Service Mesh 2.0; servicemesh-cni.src as a component of OpenShift Service Mesh 2.0; go.src as a component of Red Hat Advanced Cluster Management for Kubernetes 2; golang-bin as a component of Red Hat Ceph Storage 2; golang-src as a component of Red Hat Ceph Storage 2; golang.src as a component of Red Hat Ceph Storage 2; golang-bin as a component of Red Hat Ceph Storage 3; golang-src as a component of Red Hat Ceph Storage 3; golang.src as a component of Red Hat Ceph Storage 3; buildah.src as a component of Red Hat Enterprise Linux 7; golang as a component of Red Hat Enterprise Linux 7; golang-bin as a component of Red Hat Enterprise Linux 7; golang-docs as a component of Red Hat Enterprise Linux 7; golang-misc as a component of Red Hat Enterprise Linux 7; golang-src as a component of Red Hat Enterprise Linux 7; golang-tests as a component of Red Hat Enterprise Linux 7; golang.src as a component of Red Hat Enterprise Linux 7; podman.src as a component of Red Hat Enterprise Linux 7; buildah-tests (container-tools:1.0) as a component of Red Hat Enterprise Linux 8; buildah-tests (container-tools:2.0) as a component of Red Hat Enterprise Linux 8; buildah-tests (container-tools:rhel8) as a component of Red Hat Enterprise Linux 8; buildah.src (container-tools:1.0) as a component of Red Hat Enterprise Linux 8; buildah.src (container-tools:2.0) as a component of Red Hat Enterprise Linux 8; buildah.src (container-tools:rhel8) as a component of Red Hat Enterprise Linux 8; buildah (container-tools:1.0) as a component of Red Hat Enterprise Linux 8; buildah (container-tools:2.0) as a component of Red Hat Enterprise Linux 8; buildah (container-tools:rhel8) as a component of Red Hat Enterprise Linux 8; podman-catatonit (container-tools:1.0) as a component of Red Hat Enterprise Linux 8; podman-catatonit (container-tools:2.0) as a component of Red Hat Enterprise Linux 8; podman-catatonit (container-tools:rhel8) as a component of Red Hat Enterprise Linux 8; and 38 more
Fixed
servicemesh-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-0:2.0.9-3.el8.src as a component of OpenShift Service Mesh 2.0; servicemesh-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; servicemesh-istioctl-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-istioctl-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-istioctl-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; servicemesh-mixc-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-mixc-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-mixc-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; servicemesh-mixs-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-mixs-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-mixs-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-agent-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-agent-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-agent-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-discovery-0:2.0.9-3.el8.ppc64le as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-discovery-0:2.0.9-3.el8.s390x as a component of OpenShift Service Mesh 2.0; servicemesh-pilot-discovery-0:2.0.9-3.el8.x86_64 as a component of OpenShift Service Mesh 2.0; openshift4-wincw/windows-machine-config-operator-bundle@sha256:e6ad3e6e043aeeebc84da2071ca26bb1e89c071598b5088a8a7f237626491072_amd64 as a component of Red Hat OpenShift Container Platform 4.10; openshift4-wincw/windows-machine-config-rhel8-operator@sha256:31af4d44c7cc4e00219a99451ce2e3523cdba90d575d58979ae1355c4350b6fe_amd64 as a component of Red Hat OpenShift Container Platform 4.10; openshift4/ose-thanos-rhel8@sha256:7e5cc024b9c2ba3c62d0a274989c4ee645162fbf06bd9a2275b827df7f11a053_s390x as a component of Red Hat OpenShift Container Platform 4.8; openshift4/ose-thanos-rhel8@sha256:a271b34b22e3bd9934402677b24538119a04ca13ccd416a11e88b9b3fa55c8e2_amd64 as a component of Red Hat OpenShift Container Platform 4.8; openshift4/ose-thanos-rhel8@sha256:eb5c1ca6b4850747fe3adcf620b411db4d64f4151cc75dd37ca45f79adfbe83b_ppc64le as a component of Red Hat OpenShift Container Platform 4.8; git-lfs-0:2.13.3-3.el8_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); git-lfs-0:2.13.3-3.el8_6.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); git-lfs-0:2.13.3-3.el8_6.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); git-lfs-0:2.13.3-3.el8_6.src as a component of Red Hat Enterprise Linux AppStream (v. 8); git-lfs-0:2.13.3-3.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); git-lfs-debuginfo-0:2.13.3-3.el8_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); and 53 more
Action
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
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 2 Jan 2021 · Last source change 4 Aug 2024, 16:40 UTC · CWE-129 · Improper Validation of Array Index

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-21244
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2020-21244↗Vendor CSAF · Red Hat Product Security↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-28852 · cve.blacktree.nl