WID-SEC-W-2026-1352
Vulnerability from csaf_certbund - Published: 2026-05-04 22:00 - Updated: 2026-06-16 22:00Summary
Postfix: Schwachstelle ermöglicht Denial of Service
Severity
Niedrig
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: Postfix ist ein Open Source Email Server für Linux und unix-basierte Betriebssysteme.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Postfix ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux
- UNIX
Affected products
Known affected
10 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
Open Source Postfix <3.9.10
Open Source / Postfix
|
<3.9.10 | ||
|
Open Source Postfix <3.10.9
Open Source / Postfix
|
<3.10.9 | ||
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Open Source Postfix <3.8.16
Open Source / Postfix
|
<3.8.16 | ||
|
Microsoft Azure Linux azl3
Microsoft / Azure Linux
|
cpe:/o:microsoft:azure_linux:azl3
|
azl3 | |
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Fedora Linux
Fedora
|
cpe:/o:fedoraproject:fedora:-
|
— |
References
14 references
{
"document": {
"aggregate_severity": {
"text": "niedrig"
},
"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": "Postfix ist ein Open Source Email Server f\u00fcr Linux und unix-basierte Betriebssysteme.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Postfix ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux\n- UNIX",
"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-2026-1352 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1352.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-1352 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1352"
},
{
"category": "external",
"summary": "GitHub Security Advisory GHSA-c4gx-p7gq-g6hp vom 2026-05-04",
"url": "https://github.com/advisories/GHSA-c4gx-p7gq-g6hp"
},
{
"category": "external",
"summary": "OSS Security Mailing List vom 2026-05-04",
"url": "https://www.openwall.com/lists/oss-security/2026/05/04/30"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8253-1 vom 2026-05-07",
"url": "https://ubuntu.com/security/notices/USN-8253-1"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:10707-1 vom 2026-05-08",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ZO4LOHR75HKYCKH5Q4DTVUDIW76KSHBV/"
},
{
"category": "external",
"summary": "Microsoft Security Update Guide vom 2026-05-12",
"url": "https://msrc.microsoft.com/update-guide/"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-5CF8CC5F32 vom 2026-05-18",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-5cf8cc5f32"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-B1D51E524D vom 2026-05-18",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-b1d51e524d"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-E9FC21D7E2 vom 2026-05-18",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-e9fc21d7e2"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:25930 vom 2026-06-15",
"url": "https://access.redhat.com/errata/RHSA-2026:25930"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:25932 vom 2026-06-15",
"url": "https://access.redhat.com/errata/RHSA-2026:25932"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-25932 vom 2026-06-16",
"url": "https://linux.oracle.com/errata/ELSA-2026-25932.html"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:25932 vom 2026-06-17",
"url": "https://errata.build.resf.org/RLSA-2026:25932"
}
],
"source_lang": "en-US",
"title": "Postfix: Schwachstelle erm\u00f6glicht Denial of Service",
"tracking": {
"current_release_date": "2026-06-16T22:00:00.000+00:00",
"generator": {
"date": "2026-06-17T08:49:53.264+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-1352",
"initial_release_date": "2026-05-04T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-05-04T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-05-07T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Ubuntu aufgenommen"
},
{
"date": "2026-05-10T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-05-11T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates aufgenommen"
},
{
"date": "2026-05-18T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von Fedora aufgenommen"
},
{
"date": "2026-06-14T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-06-16T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von Oracle Linux und Rocky Enterprise Software Foundation aufgenommen"
}
],
"status": "final",
"version": "7"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Fedora Linux",
"product": {
"name": "Fedora Linux",
"product_id": "74185",
"product_identification_helper": {
"cpe": "cpe:/o:fedoraproject:fedora:-"
}
}
}
],
"category": "vendor",
"name": "Fedora"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "azl3",
"product": {
"name": "Microsoft Azure Linux azl3",
"product_id": "T049210",
"product_identification_helper": {
"cpe": "cpe:/o:microsoft:azure_linux:azl3"
}
}
}
],
"category": "product_name",
"name": "Azure Linux"
}
],
"category": "vendor",
"name": "Microsoft"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c3.8.16",
"product": {
"name": "Open Source Postfix \u003c3.8.16",
"product_id": "T053515"
}
},
{
"category": "product_version",
"name": "3.8.16",
"product": {
"name": "Open Source Postfix 3.8.16",
"product_id": "T053515-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:postfix:postfix:3.8.16"
}
}
},
{
"category": "product_version_range",
"name": "\u003c3.9.10",
"product": {
"name": "Open Source Postfix \u003c3.9.10",
"product_id": "T053516"
}
},
{
"category": "product_version",
"name": "3.9.10",
"product": {
"name": "Open Source Postfix 3.9.10",
"product_id": "T053516-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:postfix:postfix:3.9.10"
}
}
},
{
"category": "product_version_range",
"name": "\u003c3.10.9",
"product": {
"name": "Open Source Postfix \u003c3.10.9",
"product_id": "T053517"
}
},
{
"category": "product_version",
"name": "3.10.9",
"product": {
"name": "Open Source Postfix 3.10.9",
"product_id": "T053517-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:postfix:postfix:3.10.9"
}
}
}
],
"category": "product_name",
"name": "Postfix"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"category": "product_name",
"name": "Oracle Linux",
"product": {
"name": "Oracle Linux",
"product_id": "T004914",
"product_identification_helper": {
"cpe": "cpe:/o:oracle:linux:-"
}
}
}
],
"category": "vendor",
"name": "Oracle"
},
{
"branches": [
{
"category": "product_name",
"name": "RESF Rocky Linux",
"product": {
"name": "RESF Rocky Linux",
"product_id": "T032255",
"product_identification_helper": {
"cpe": "cpe:/o:resf:rocky_linux:-"
}
}
}
],
"category": "vendor",
"name": "RESF"
},
{
"branches": [
{
"category": "product_name",
"name": "Red Hat Enterprise Linux",
"product": {
"name": "Red Hat Enterprise Linux",
"product_id": "67646",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:-"
}
}
}
],
"category": "vendor",
"name": "Red Hat"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE openSUSE",
"product": {
"name": "SUSE openSUSE",
"product_id": "T027843",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"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-2026-43964",
"product_status": {
"known_affected": [
"67646",
"T000126",
"T053516",
"T053517",
"T027843",
"T053515",
"T049210",
"T004914",
"T032255",
"74185"
]
},
"release_date": "2026-05-04T22:00:00.000+00:00",
"title": "CVE-2026-43964"
}
]
}
Loading…
Loading…
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.
Loading…
Loading…