---
cve: "CVE-2017-11103"
severity: "LOW"
cvss: 3.1
epss: "5.1%"
vendor: "n/a"
kev: false
exploited: false
published: "2017-07-13 13:29:00"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T02:30:15+02:00"
---

# CVE-2017-11103

> 3.1 LOW · 🧪 PoC

## Beschreibung

Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.

## Patch verfügbar (OSV)

- a3d72c604378e0bff787cc426f2b17f75b112dce (Commit)
- 9fb0aa56baf317c5bf18417c5516f951207af82d (Commit)

## Referenzen

- <https://support.apple.com/HT208221>
- <http://www.debian.org/security/2017/dsa-3912>
- <https://support.apple.com/HT208144>
- <https://www.orpheus-lyre.info/>
- <https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc>
- <http://www.securityfocus.com/bid/99551>
- <http://www.securitytracker.com/id/1039427>
- <https://www.samba.org/samba/security/CVE-2017-11103.html>
- <http://www.securitytracker.com/id/1038876>
- <https://support.apple.com/HT208112>
- <https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0>
- <http://www.h5l.org/advisories.html?show=2017-07-11>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2017-11103) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_