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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | heimdal | 7.4.0.dfsg.1-1 | — |
| Debian 14 | samba | 2:4.6.5+dfsg-4 | — |
| Debian 13 | heimdal | 7.4.0.dfsg.1-1 | — |
| Debian 13 | samba | 2:4.6.5+dfsg-4 | — |
| Debian 12 | heimdal | 7.4.0.dfsg.1-1 | — |
| Debian 12 | samba | 2:4.6.5+dfsg-4 | — |
| Debian 9 | heimdal | 7.1.0+dfsg-13+deb9u1 | DSA-3912-1 |
| Debian 9 | samba | 2:4.5.8+dfsg-2+deb9u1 | DSA-3909-1 |
| Debian 8 | heimdal | 1.6~rc2+dfsg-9+deb8u1 | DSA-3912-1 |
| Debian 8 | samba | 2:4.2.14+dfsg-0+deb8u7 | DSA-3909-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | heimdal | 1.6~git20120403+dfsg1-2+deb7u1 | DLA-1027-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | heimdal | 1.7~git20150920+dfsg-4ubuntu1.16.04.1 | USN-3353-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.9 | USN-3353-2 |
| Ubuntu 14.04 LTS | heimdal | 1.6~git20131207+dfsg-1ubuntu1.2 | USN-3353-1 |
| Ubuntu 14.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.14.04.10 | USN-3353-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | resource-agents | 4.0.1+git.1495055229.643177f1-2.4.2 | SUSE-SU-2017:2237-1 |
| SLES 12 SP3 | samba | 4.6.7+git.38.90b2cdb4f22-3.7.1 | SUSE-SU-2017:2237-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | samba | 4.6.7+git.38.90b2cdb4f22-3.7.1 | SUSE-SU-2017:2237-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | heimdal | 7.4.0-r0 | — |
| Alpine v3.23 | heimdal | 7.4.0-r0 | — |
| Alpine v3.22 | heimdal | 7.4.0-r0 | — |
| Alpine v3.21 | heimdal | 7.4.0-r0 | — |
| Alpine v3.20 | heimdal | 7.4.0-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | heimdal | 7.4.0-r0 | — |
| Alpine v3.18 | heimdal | 7.4.0-r0 | — |
| Alpine v3.17 | heimdal | 7.4.0-r0 | — |
| Alpine v3.16 | heimdal | 7.4.0-r0 | — |
| Alpine v3.15 | heimdal | 7.4.0-r0 | — |
| Alpine v3.14 | heimdal | 7.4.0-r0 | — |
| Alpine v3.13 | heimdal | 7.4.0-r0 | — |
| Alpine v3.12 | heimdal | 7.4.0-r0 | — |
| Alpine v3.11 | heimdal | 7.4.0-r0 | — |
| Alpine v3.10 | heimdal | 7.4.0-r0 | — |
| Alpine v3.9 | heimdal | 7.4.0-r0 | — |
| Alpine v3.8 | heimdal | 7.4.0-r0 | — |
| Alpine v3.7 | heimdal | 7.4.0-r0 | — |
| Alpine v3.6 | heimdal | 7.1.0-r1 | — |
| Alpine v3.6 | samba | 4.6.4-r1 | — |
| Alpine v3.5 | heimdal | 1.6_rc2-r6 | — |
| Alpine v3.5 | samba | 4.5.10-r1 | — |
| Alpine v3.4 | heimdal | 1.6_rc2-r5 | — |
| Alpine v3.4 | samba | 4.4.14-r1 | — |
| Alpine v3.3 | heimdal | 1.6_rc2-r5 | — |
| Alpine v3.3 | samba | 4.2.14-r4 | — |
Advisories 8
- USN-3353-2 samba vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3353-1 heimdal vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3912-1 heimdal - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3909-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1027-1 heimdal - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11365-1 ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2237-1 Security update for samba and resource-agents SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0370 Apple Mac OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 13, 2025
References
- https://support.apple.com/HT208221
- DSA-3912 vendor-advisory
- https://support.apple.com/HT208144
- https://www.orpheus-lyre.info/
- FreeBSD-SA-17:05 vendor-advisory
- 99551 vdb-entry
- 1039427 vdb-entry
- https://www.samba.org/samba/security/CVE-2017-11103.html
- 1038876 vdb-entry
- https://support.apple.com/HT208112
- https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0
- http://www.h5l.org/advisories.html?show=2017-07-11