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
Affected Vendors & Products
Advisories
Source | ID | Title |
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DLA-1027-1 | heimdal security update |
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DSA-3909-1 | samba security update |
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DSA-3912-1 | heimdal security update |
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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. |
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USN-3353-1 | Heimdal vulnerability |
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USN-3353-2 | Samba vulnerability |
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USN-3353-3 | Heimdal vulnerability |
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USN-3353-4 | Samba vulnerability |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.

Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T17:57:57.836Z
Reserved: 2017-07-07T00:00:00
Link: CVE-2017-11103

No data.

Status : Deferred
Published: 2017-07-13T13:29:00.173
Modified: 2025-04-20T01:37:25.860
Link: CVE-2017-11103


No data.