CVEvulnerability

CVE-2017-11103

8.1 HIGH Published 2017-07-13 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2017-07-13
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-345

Description

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.

Affected configurations

• heimdal project heimdal (< 7.4.0) • freebsd freebsd • samba samba (>= 4.0.0 < 4.4.15) • samba samba (>= 4.5.0 < 4.5.12) • samba samba (>= 4.6.0 < 4.6.6) • apple iphone os (< 11.0) • apple mac os x (< 10.13.1) • debian debian linux 8.0 • debian debian linux 9.0 • debian debian linux 10.0

Related

Weakness · CWE (1)

  • CWE-345 Insufficient Verification of Data Authenticity weakness

References