---
cve: "CVE-2016-6210"
severity: "MEDIUM"
cvss: 5.9
epss: "88.9%"
vendor: "n/a"
kev: false
exploited: false
published: "2017-02-13 17:59:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-10T09:43:32+02:00"
---

# CVE-2016-6210

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Exploit-Evidenz

- [EDB-40136 — OpenSSH 7.2p2 - Username Enumeration](https://www.exploit-db.com/exploits/40136)
- [EDB-40113 — OpenSSHd 7.2p2 - Username Enumeration](https://www.exploit-db.com/exploits/40113)

## Patch verfügbar (OSV)

- 99522ba7ec6963a05c04a156bf20e3ba3605987c (Commit)

## BSI-Hinweise (deutsch)

- [OpenSSH: Schwachstelle ermöglicht Offenlegung von Informationen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2023-0450)

## Referenzen

- <https://access.redhat.com/errata/RHSA-2017:2563>
- <http://www.securitytracker.com/id/1036319>
- <http://seclists.org/fulldisclosure/2016/Jul/51>
- <http://www.debian.org/security/2016/dsa-3626>
- <https://www.exploit-db.com/exploits/40136/>
- <https://www.exploit-db.com/exploits/40113/>
- <https://www.openssh.com/txt/release-7.3>
- <https://security.gentoo.org/glsa/201612-18>
- <https://access.redhat.com/errata/RHSA-2017:2029>
- <http://www.securityfocus.com/bid/91812>
- <https://security.netapp.com/advisory/ntap-20190206-0001/>
- <https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2016-6210/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_