WID-SEC-W-2026-3129
Vulnerability from csaf_certbund - Published: 2021-04-08 22:00 - Updated: 2026-08-31 22:00Summary
Red Hat Enterprise Linux: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.
Oracle Linux ist ein Open Source Betriebssystem, welches unter der GNU General Public License (GPL) verfügbar ist.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux und Oracle Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
Betroffene Betriebssysteme: - Linux
Affected products
Known affected
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Avaya Aura Experience Portal
Avaya
|
cpe:/a:avaya:aura_experience_portal:-
|
— | |
|
Avaya Aura System Manager
Avaya
|
cpe:/a:avaya:aura_system_manager:-
|
— | |
|
Dell Secure Connect Gateway <5.36.00.16
Dell / Secure Connect Gateway
|
<5.36.00.16 | ||
|
Avaya Aura Application Enablement Services
Avaya
|
cpe:/a:avaya:aura_application_enablement_services:-
|
— | |
|
Red Hat Enterprise Linux 7
Red Hat / Enterprise Linux
|
cpe:/o:redhat:enterprise_linux:7
|
7 | |
|
Avaya Aura Session Manager
Avaya
|
cpe:/a:avaya:session_manager:-
|
— | |
|
Avaya Aura Communication Manager
Avaya
|
cpe:/a:avaya:communication_manager:-
|
— | |
|
Gentoo Linux
Gentoo
|
cpe:/o:gentoo:linux:-
|
— | |
|
NetApp ActiveIQ Unified Manager
NetApp
|
cpe:/a:netapp:active_iq_unified_manager:-::~~~vmware_vsphere~~
|
— | |
|
Avaya Web License Manager
Avaya
|
cpe:/a:avaya:web_license_manager:-
|
— | |
|
Oracle Linux 7
Oracle / Linux
|
cpe:/o:oracle:linux:7
|
7 | |
|
Debian Linux
Debian
|
cpe:/o:debian:debian_linux:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
Juniper JUNOS
Juniper
|
cpe:/o:juniper:junos:-
|
— | |
|
F5 BIG-IP
F5
|
cpe:/a:f5:big-ip:-
|
— | |
|
Open Source CentOS
Open Source
|
cpe:/o:centos:centos:-
|
— |
References
36 references
{
"document": {
"aggregate_severity": {
"text": "hoch"
},
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "de-DE",
"notes": [
{
"category": "legal_disclaimer",
"text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
},
{
"category": "description",
"text": "Red Hat Enterprise Linux (RHEL) ist eine popul\u00e4re Linux-Distribution.\r\nOracle Linux ist ein Open Source Betriebssystem, welches unter der GNU General Public License (GPL) verf\u00fcgbar ist.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux und Oracle Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux",
"title": "Betroffene Betriebssysteme"
}
],
"publisher": {
"category": "other",
"contact_details": "csaf-provider@cert-bund.de",
"name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
"namespace": "https://www.bsi.bund.de"
},
"references": [
{
"category": "self",
"summary": "WID-SEC-W-2026-3129 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2026-3129.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-3129 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3129"
},
{
"category": "external",
"summary": "Red Hat Security Adivisory: RHSA-2021:1145 vom 2021-04-08",
"url": "https://access.redhat.com/errata/RHSA-2021:1145"
},
{
"category": "external",
"summary": "Oracle Linux: ELSA-2021-1145 vom 2021-04-08",
"url": "https://linux.oracle.com/errata/ELSA-2021-1145.html"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-4906-1 vom 2021-04-13",
"url": "https://ubuntu.com/security/notices/USN-4906-1"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1206 vom 2021-04-14",
"url": "https://access.redhat.com/errata/RHSA-2021:1206"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2021-1206 vom 2021-04-16",
"url": "https://linux.oracle.com/errata/ELSA-2021-1206.html"
},
{
"category": "external",
"summary": "CentOS Security Advisory CESA-2021:1145 vom 2021-04-16",
"url": "http://centos-announce.2309468.n4.nabble.com/CentOS-announce-CESA-2021-1145-Important-CentOS-7-nettle-Security-Update-tp4646170.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1245 vom 2021-04-19",
"url": "https://access.redhat.com/errata/RHSA-2021:1245"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1246 vom 2021-04-19",
"url": "https://access.redhat.com/errata/RHSA-2021:1246"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1338 vom 2021-04-22",
"url": "https://access.redhat.com/errata/RHSA-2021:1338"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1448 vom 2021-04-28",
"url": "https://access.redhat.com/errata/RHSA-2021:1448"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2021:1412-1 vom 2021-05-05",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2021-May/008738.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1429 vom 2021-05-05",
"url": "https://access.redhat.com/errata/RHSA-2021:1429"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:1499 vom 2021-05-04",
"url": "https://access.redhat.com/errata/RHSA-2021:1499"
},
{
"category": "external",
"summary": "AVAYA Security Advisory ASA-2021-028 vom 2021-05-04",
"url": "https://downloads.avaya.com/css/P8/documents/101075639"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2041 vom 2021-05-19",
"url": "https://access.redhat.com/errata/RHSA-2021:2041"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2053 vom 2021-05-19",
"url": "https://access.redhat.com/errata/RHSA-2021:2053"
},
{
"category": "external",
"summary": "Gentoo Linux Security Advisory GLSA-202105-31 vom 2021-05-26",
"url": "https://security.gentoo.org/glsa/202105-31"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2280 vom 2021-06-08",
"url": "https://access.redhat.com/errata/RHSA-2021:2280"
},
{
"category": "external",
"summary": "F5 Security Advisory K33101555 vom 2021-06-08",
"url": "https://support.f5.com/csp/article/K33101555?utm_source=f5support\u0026utm_medium=RSS"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2356 vom 2021-06-09",
"url": "https://access.redhat.com/errata/RHSA-2021:2356"
},
{
"category": "external",
"summary": "AVAYA Security Advisory ASA-2021-039 vom 2021-06-16",
"url": "https://downloads.avaya.com/css/P8/documents/101076246"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2479 vom 2021-06-17",
"url": "https://access.redhat.com/errata/RHSA-2021:2479"
},
{
"category": "external",
"summary": "Debian Security Advisory DSA-4933 vom 2021-06-18",
"url": "https://www.debian.org/security/2021/dsa-4933"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2532 vom 2021-06-23",
"url": "https://access.redhat.com/errata/RHSA-2021:2532"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2543 vom 2021-06-24",
"url": "https://access.redhat.com/errata/RHSA-2021:2543"
},
{
"category": "external",
"summary": "Juniper Security Advisory JSA11206 vom 2021-07-14",
"url": "https://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA11206\u0026cat=SIRT_1"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2758 vom 2021-07-15",
"url": "https://access.redhat.com/errata/RHSA-2021:2758"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:2760 vom 2021-07-19",
"url": "https://access.redhat.com/errata/RHSA-2021:2760"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:3016 vom 2021-08-06",
"url": "https://access.redhat.com/errata/RHSA-2021:3016"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2021:3556 vom 2021-09-17",
"url": "https://access.redhat.com/errata/RHSA-2021:3556"
},
{
"category": "external",
"summary": "Debian Security Advisory DLA-2760 vom 2021-09-18",
"url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html"
},
{
"category": "external",
"summary": "NetApp Security Advisory NTAP-20211022-0002 vom 2021-10-22",
"url": "https://security.netapp.com/advisory/ntap-20211022-0002/"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2022:0056 vom 2022-03-10",
"url": "https://access.redhat.com/errata/RHSA-2022:0056"
},
{
"category": "external",
"summary": "Dell Security Advisory DSA-2026-386 vom 2026-09-01",
"url": "https://www.dell.com/support/kbdoc/000503504/dsa-2026-386-security-update-f"
}
],
"source_lang": "en-US",
"title": "Red Hat Enterprise Linux: Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
"tracking": {
"current_release_date": "2026-08-31T22:00:00.000+00:00",
"generator": {
"date": "2026-09-01T10:52:47.752+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-3129",
"initial_release_date": "2021-04-08T22:00:00.000+00:00",
"revision_history": [
{
"date": "2021-04-08T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2021-04-13T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Ubuntu aufgenommen"
},
{
"date": "2021-04-14T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-04-18T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Oracle Linux und CentOS aufgenommen"
},
{
"date": "2021-04-19T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-04-22T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-04-28T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-05-04T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von SUSE und Red Hat aufgenommen"
},
{
"date": "2021-05-05T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von AVAYA aufgenommen"
},
{
"date": "2021-05-18T22:00:00.000+00:00",
"number": "10",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-05-19T22:00:00.000+00:00",
"number": "11",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-05-25T22:00:00.000+00:00",
"number": "12",
"summary": "Neue Updates von Gentoo aufgenommen"
},
{
"date": "2021-06-07T22:00:00.000+00:00",
"number": "13",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-06-08T22:00:00.000+00:00",
"number": "14",
"summary": "Neue Updates von F5 aufgenommen"
},
{
"date": "2021-06-17T22:00:00.000+00:00",
"number": "15",
"summary": "Neue Updates von AVAYA und Red Hat aufgenommen"
},
{
"date": "2021-06-20T22:00:00.000+00:00",
"number": "16",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2021-06-23T22:00:00.000+00:00",
"number": "17",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-06-24T22:00:00.000+00:00",
"number": "18",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-07-14T22:00:00.000+00:00",
"number": "19",
"summary": "Neue Updates von Juniper aufgenommen"
},
{
"date": "2021-07-15T22:00:00.000+00:00",
"number": "20",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-07-18T22:00:00.000+00:00",
"number": "21",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-08-05T22:00:00.000+00:00",
"number": "22",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-09-16T22:00:00.000+00:00",
"number": "23",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2021-09-19T22:00:00.000+00:00",
"number": "24",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2021-10-24T22:00:00.000+00:00",
"number": "25",
"summary": "Neue Updates von NetApp aufgenommen"
},
{
"date": "2022-03-10T23:00:00.000+00:00",
"number": "26",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-08-31T22:00:00.000+00:00",
"number": "27",
"summary": "Neue Updates von Dell aufgenommen"
}
],
"status": "final",
"version": "27"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Avaya Aura Application Enablement Services",
"product": {
"name": "Avaya Aura Application Enablement Services",
"product_id": "T015516",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:aura_application_enablement_services:-"
}
}
},
{
"category": "product_name",
"name": "Avaya Aura Communication Manager",
"product": {
"name": "Avaya Aura Communication Manager",
"product_id": "T015126",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:communication_manager:-"
}
}
},
{
"category": "product_name",
"name": "Avaya Aura Experience Portal",
"product": {
"name": "Avaya Aura Experience Portal",
"product_id": "T015519",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:aura_experience_portal:-"
}
}
},
{
"category": "product_name",
"name": "Avaya Aura Session Manager",
"product": {
"name": "Avaya Aura Session Manager",
"product_id": "T015127",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:session_manager:-"
}
}
},
{
"category": "product_name",
"name": "Avaya Aura System Manager",
"product": {
"name": "Avaya Aura System Manager",
"product_id": "T015518",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:aura_system_manager:-"
}
}
},
{
"category": "product_name",
"name": "Avaya Web License Manager",
"product": {
"name": "Avaya Web License Manager",
"product_id": "T016243",
"product_identification_helper": {
"cpe": "cpe:/a:avaya:web_license_manager:-"
}
}
}
],
"category": "vendor",
"name": "Avaya"
},
{
"branches": [
{
"category": "product_name",
"name": "Debian Linux",
"product": {
"name": "Debian Linux",
"product_id": "2951",
"product_identification_helper": {
"cpe": "cpe:/o:debian:debian_linux:-"
}
}
}
],
"category": "vendor",
"name": "Debian"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway \u003c5.36.00.16",
"product_id": "T058878"
}
},
{
"category": "product_version",
"name": "5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway 5.36.00.16",
"product_id": "T058878-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:dell:secure_connect_gateway:5.36.00.16"
}
}
}
],
"category": "product_name",
"name": "Secure Connect Gateway"
}
],
"category": "vendor",
"name": "Dell"
},
{
"branches": [
{
"category": "product_name",
"name": "F5 BIG-IP",
"product": {
"name": "F5 BIG-IP",
"product_id": "T001663",
"product_identification_helper": {
"cpe": "cpe:/a:f5:big-ip:-"
}
}
}
],
"category": "vendor",
"name": "F5"
},
{
"branches": [
{
"category": "product_name",
"name": "Gentoo Linux",
"product": {
"name": "Gentoo Linux",
"product_id": "T012167",
"product_identification_helper": {
"cpe": "cpe:/o:gentoo:linux:-"
}
}
}
],
"category": "vendor",
"name": "Gentoo"
},
{
"branches": [
{
"category": "product_name",
"name": "Juniper JUNOS",
"product": {
"name": "Juniper JUNOS",
"product_id": "5930",
"product_identification_helper": {
"cpe": "cpe:/o:juniper:junos:-"
}
}
}
],
"category": "vendor",
"name": "Juniper"
},
{
"branches": [
{
"category": "product_name",
"name": "NetApp ActiveIQ Unified Manager",
"product": {
"name": "NetApp ActiveIQ Unified Manager",
"product_id": "658714",
"product_identification_helper": {
"cpe": "cpe:/a:netapp:active_iq_unified_manager:-::~~~vmware_vsphere~~"
}
}
}
],
"category": "vendor",
"name": "NetApp"
},
{
"branches": [
{
"category": "product_name",
"name": "Open Source CentOS",
"product": {
"name": "Open Source CentOS",
"product_id": "1727",
"product_identification_helper": {
"cpe": "cpe:/o:centos:centos:-"
}
}
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "7",
"product": {
"name": "Oracle Linux 7",
"product_id": "T018830",
"product_identification_helper": {
"cpe": "cpe:/o:oracle:linux:7"
}
}
}
],
"category": "product_name",
"name": "Linux"
}
],
"category": "vendor",
"name": "Oracle"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "7",
"product": {
"name": "Red Hat Enterprise Linux 7",
"product_id": "T003303",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:7"
}
}
}
],
"category": "product_name",
"name": "Enterprise Linux"
}
],
"category": "vendor",
"name": "Red Hat"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux",
"product": {
"name": "SUSE Linux",
"product_id": "T002207",
"product_identification_helper": {
"cpe": "cpe:/o:suse:suse_linux:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
},
{
"branches": [
{
"category": "product_name",
"name": "Ubuntu Linux",
"product": {
"name": "Ubuntu Linux",
"product_id": "T000126",
"product_identification_helper": {
"cpe": "cpe:/o:canonical:ubuntu_linux:-"
}
}
}
],
"category": "vendor",
"name": "Ubuntu"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2021-20305",
"product_status": {
"known_affected": [
"T015519",
"T015518",
"T058878",
"T015516",
"T003303",
"T015127",
"T015126",
"T012167",
"658714",
"T016243",
"T018830",
"2951",
"T002207",
"T000126",
"5930",
"T001663",
"1727"
]
},
"release_date": "2021-04-08T22:00:00.000+00:00",
"title": "CVE-2021-20305"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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