CVE-2017-11103
Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names…
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 5.1% · top 7.6% of all CVEs (4 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
n/a
- affected n/a
References (12)
- https://support.apple.com/HT208221 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3912 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://support.apple.com/HT208144 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.orpheus-lyre.info/ (opens in a new tab)x_refsource_MISCx_transferred
- FreeBSD-SA-17:05 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 99551 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 1039427 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://www.samba.org/samba/security/CVE-2017-11103.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1038876 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://support.apple.com/HT208112 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.h5l.org/advisories.html?show=2017-07-11 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-11103)Record last updated .