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.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-1027-1 | heimdal security update |
Debian DSA |
DSA-3909-1 | samba security update |
Debian DSA |
DSA-3912-1 | heimdal security update |
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 |
USN-3353-1 | Heimdal vulnerability |
Ubuntu USN |
USN-3353-2 | Samba vulnerability |
Ubuntu USN |
USN-3353-3 | Heimdal vulnerability |
Ubuntu USN |
USN-3353-4 | Samba vulnerability |
References
History
No history.
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T17:57:57.836Z
Reserved: 2017-07-07T00:00:00.000Z
Link: CVE-2017-11103
No data.
Status : Modified
Published: 2017-07-13T13:29:00.173
Modified: 2026-05-13T00:24:29.033
Link: CVE-2017-11103
OpenCVE Enrichment
No data.
Debian DLA
Debian DSA
EUVD
Ubuntu USN