CVE-2017-11103
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.
How to fix
- heimdal_project heimdal7.4.0 or later
- samba samba4.4.15, 4.5.12, 4.6.6 or later
- apple iphone_os11.0 or later
- apple mac_os_x10.13.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| heimdal_project heimdal | v < 7.4.0 | 7.4.0 |
| freebsd freebsd | No range specified | — |
| samba samba | 4.0.0 ≤ v < 4.4.15, 4.5.0 ≤ v < 4.5.12, 4.6.0 ≤ v < 4.6.6 | 4.4.15, 4.5.12, 4.6.6 |
| apple iphone_os | v < 11.0 | 11.0 |
| apple mac_os_x | v < 10.13.1 | 10.13.1 |
| debian debian_linux | 8.0, 9.0, 10.0 | — |
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