CVE-2017-11103

Priority
Medium
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.
References
Bugs
Package
Source: samba (LP Ubuntu Debian)
Upstream:needs-triage
Ubuntu 17.10 (Artful Aardvark):released (2:4.5.8+dfsg-2ubuntu4)
Ubuntu 12.04 ESM (Precise Pangolin):released (2:3.6.25-0ubuntu0.12.04.12)
Ubuntu 14.04 LTS (Trusty Tahr):released (2:4.3.11+dfsg-0ubuntu0.14.04.10)
Ubuntu 16.04 LTS (Xenial Xerus):released (2:4.3.11+dfsg-0ubuntu0.16.04.9)
Ubuntu 17.04 (Zesty Zapus):released (2:4.5.8+dfsg-0ubuntu0.17.04.4)
Package
Upstream:needs-triage
Ubuntu 17.10 (Artful Aardvark):not-affected (7.4.0.dfsg.1-1)
Ubuntu 12.04 ESM (Precise Pangolin):released (1.6~git20120311.dfsg.1-2ubuntu0.2)
Ubuntu 14.04 LTS (Trusty Tahr):released (1.6~git20131207+dfsg-1ubuntu1.2)
Ubuntu 16.04 LTS (Xenial Xerus):released (1.7~git20150920+dfsg-4ubuntu1.16.04.1)
Ubuntu 17.04 (Zesty Zapus):released (7.1.0+dfsg-9ubuntu1.1)
More Information

Updated: 2017-10-17 19:14:30 UTC (commit 13537)