CVE-2018-15473 — CVE & Security Advisory Radar

🎯 CVE-2018-15473 🧪 PoC 🇪🇺 EUVD

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CVE-2018-15473 | OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

Klassifikation & Betroffenheit:

n/a n/a n/aopenbsd openssh *debian debian_linux 8.0debian debian_linux 9.0redhat enterprise_linux_desktop 6.0redhat enterprise_linux_desktop 7.0redhat enterprise_linux_server 6.0redhat enterprise_linux_server 7.0

Improper Control of Generation of Code ('Code Injection') 🎯 Medium

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

🛡️ Empfohlene Mitigation: Refactor your program so that you do not have to dynamically generate code.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-35 · Leverage Executable Code in Non-Executab… (Very High) CAPEC-77 · Manipulating User-Controlled Variables (Very High) CAPEC-242 · Code Injection (High)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1027.006 · Obfuscated Files or Information: H… T1027.009 · Obfuscated Files or Information: E… T1564.009 · Hide Artifacts: Resource Forking

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-71622 7.4 CVE-2026-79389 7.4 CVE-2026-56135 7.4 CVE-2026-51953 7.4 CVE-2026-45389 7.4

🧪 Exploit-Evidenz: EDB-45233 · OpenSSH 2.3 < 7.7 - Username Enumeration verified EDB-45210 · OpenSSH 2.3 < 7.7 - Username Enumeration (PoC) verified EDB-45939 · OpenSSH < 7.7 - User Enumeration (2)

🐙 trimstray/massh-enum 🐙 gbonacini/opensshenum 🐙 Rhynorater/CVE-2018-15473-Exploi 🐙 epi052/cve-2018-15473 🐙 pyperanger/CVE-2018-15473_exploi

🩹 Patch verfügbar (OSV):

🩹 779974d35b4859c07bc3cb8a12c74b43b0a7d1e0 (Commit)

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2018

Veröffentlicht 08/2018

Heute 21.09.

CVSS-Vektor-Analyse: 5.9

AV · Angriffsvektor Netzwerk

AC · Komplexität Hoch

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Keine

A · Verfügbarkeit Keine

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Veröffentlicht:17.08.2018

Aktualisiert:17.06.2026 01:42

Assigner (CNA):mitre

EUVD-ID:EUVD-2018-7351

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-09-02	2026-09-20
≥90 %	0	489
≥50 %	0	1477
≥10 %	0	0
<10 %	300	0

EPSS

98.6%

CVE-2018-15473 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

n/a

CVE-2018-15473 | OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

17.08.2018

🛡️ Details ➔

CVE-2018-15473 | OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

Zero-Day & Vulnerability Intelligence Hub

CVE-2018-15473 | OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.