---
cve: "CVE-2017-7562"
severity: "MEDIUM"
cvss: 6.5
epss: "3.3%"
vendor: "MIT"
kev: false
exploited: false
published: "2018-07-26 15:29:00"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T17:52:11+02:00"
---

# CVE-2017-7562

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.

## CVSS-Vektor

```
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
```

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

## Patch verfügbar (OSV)

- 8e153e3e8feb88780413d642273d60f0c15b2fe6 (Commit)

## Referenzen

- <https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2>
- <http://www.securityfocus.com/bid/100511>
- <https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196>
- <https://github.com/krb5/krb5/pull/694>
- <https://access.redhat.com/errata/RHSA-2018:0666>
- <https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d>
- <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2017-7562) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_