WID-SEC-W-2026-2007
Vulnerability from csaf_certbund - Published: 2026-06-18 22:00 - Updated: 2026-08-10 22:00Summary
libssh2: Schwachstelle ermöglicht Denial of Service und Offenlegung von Informationen
Severity
Mittel
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: libssh2 ist eine C Bibliothek für das Anbieten von SSH2 Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuführen, Dateien zu übertragen oder als sicherer und transparenter Tunnel für entfernte Programme genutzt werden.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh2 ausnutzen, um einen Denial of Service Angriff durchzuführen oder Informationen offenzulegen.
Betroffene Betriebssysteme: - Linux
- UNIX
Affected products
Known affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Open Source nmap <7.991
Open Source / nmap
|
<7.991 | ||
|
Debian Linux
Debian
|
cpe:/o:debian:debian_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
Open Source libssh2 1.11.1 <commit 2dae302
Open Source / libssh2
|
1.11.1 <commit 2dae302 |
References
12 references
{
"document": {
"aggregate_severity": {
"text": "mittel"
},
"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": "libssh2 ist eine C Bibliothek f\u00fcr das Anbieten von SSH2 Diensten auf Client- und Serverseite. Sie kann genutzt werden, um aus der Ferne Programme auszuf\u00fchren, Dateien zu \u00fcbertragen oder als sicherer und transparenter Tunnel f\u00fcr entfernte Programme genutzt werden.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libssh2 ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren oder Informationen offenzulegen.",
"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-2026-2007 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2007.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-2007 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2007"
},
{
"category": "external",
"summary": "GitHub Advisory Database vom 2026-06-18",
"url": "https://github.com/advisories/GHSA-3WQH-87FG-FFGG"
},
{
"category": "external",
"summary": "Debian Security Advisory DSA-6365 vom 2026-06-25",
"url": "https://security-tracker.debian.org/tracker/DSA-6365-1"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:11109-1 vom 2026-06-26",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/SRBHQ76PA4ZHTWY5F4ESYPYF3G2NLGWI/"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:30132 vom 2026-06-27",
"url": "https://access.redhat.com/errata/RHSA-2026:30132"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:30132 vom 2026-06-26",
"url": "https://access.redhat.com/errata/RHSA-2026:30132"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8486-1 vom 2026-06-30",
"url": "https://ubuntu.com/security/notices/USN-8486-1"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3525-1 vom 2026-08-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028175.html"
},
{
"category": "external",
"summary": "Nmap Changelog vom 2026-08-08",
"url": "https://nmap.org/changelog.html#7.991"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3526-1 vom 2026-08-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028174.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3541-1 vom 2026-08-11",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-August/028188.html"
}
],
"source_lang": "en-US",
"title": "libssh2: Schwachstelle erm\u00f6glicht Denial of Service und Offenlegung von Informationen",
"tracking": {
"current_release_date": "2026-08-10T22:00:00.000+00:00",
"generator": {
"date": "2026-08-11T08:56:10.841+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-2007",
"initial_release_date": "2026-06-18T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-06-18T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-06-25T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2026-06-28T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von openSUSE und Red Hat aufgenommen"
},
{
"date": "2026-06-30T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Ubuntu aufgenommen"
},
{
"date": "2026-08-09T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-10T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von SUSE aufgenommen"
}
],
"status": "final",
"version": "6"
}
},
"product_tree": {
"branches": [
{
"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": "1.11.1 \u003ccommit 2dae302",
"product": {
"name": "Open Source libssh2 1.11.1 \u003ccommit 2dae302",
"product_id": "T055634"
}
},
{
"category": "product_version",
"name": "1.11.1 commit 2dae302",
"product": {
"name": "Open Source libssh2 1.11.1 commit 2dae302",
"product_id": "T055634-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:libssh2:libssh2:1.11.1__commit_2dae302"
}
}
}
],
"category": "product_name",
"name": "libssh2"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c7.991",
"product": {
"name": "Open Source nmap \u003c7.991",
"product_id": "T057743"
}
},
{
"category": "product_version",
"name": "7.991",
"product": {
"name": "Open Source nmap 7.991",
"product_id": "T057743-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:nmap:nmap:7.991"
}
}
}
],
"category": "product_name",
"name": "nmap"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"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 Linux",
"product": {
"name": "SUSE Linux",
"product_id": "T054646",
"product_identification_helper": {
"cpe": "cpe:/o:suse:suse_linux:-"
}
}
},
{
"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-2025-15661",
"product_status": {
"known_affected": [
"T057743",
"2951",
"67646",
"T000126",
"T027843",
"T054646",
"T055634"
]
},
"release_date": "2026-06-18T22:00:00.000+00:00",
"title": "CVE-2025-15661"
}
]
}
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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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