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.
Published: 2017-07-13
Score: 8.1 High
EPSS: 5.3% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1027-1 heimdal security update
Debian DSA Debian DSA DSA-3909-1 samba security update
Debian DSA Debian DSA DSA-3912-1 heimdal security update
EUVD EUVD EUVD-2017-2740 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.
Ubuntu USN Ubuntu USN USN-3353-1 Heimdal vulnerability
Ubuntu USN Ubuntu USN USN-3353-2 Samba vulnerability
Ubuntu USN Ubuntu USN USN-3353-3 Heimdal vulnerability
Ubuntu USN Ubuntu USN USN-3353-4 Samba vulnerability
History

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Subscriptions

Apple Iphone Os Mac Os X
Debian Debian Linux
Freebsd Freebsd
Heimdal Project Heimdal
Samba Samba
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T17:57:57.836Z

Reserved: 2017-07-07T00:00:00.000Z

Link: CVE-2017-11103

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2017-07-13T13:29:00.173

Modified: 2026-05-13T00:24:29.033

Link: CVE-2017-11103

cve-icon Redhat

Severity : Important

Publid Date: 2017-07-11T00:00:00Z

Links: CVE-2017-11103 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses