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VULNERABILITIES

CVE-2017-11103 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0 CVERelease Notes
https://support.apple.com/HT208112 CVEThird Party Advisory
https://support.apple.com/HT208144 CVEThird Party Advisory
https://support.apple.com/HT208221 CVEThird Party Advisory
https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc CVEThird Party Advisory

see all 24 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-345Insufficient Verification of Data Authenticity[email protected]

Affected Products

ProductVersions

Change History

12 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2017-11103
NVD Published Date:
Jul 13, 2017
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2017-11103 Details - Not Deferred