{"id":"UBUNTU-CVE-2017-11103","details":"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.","modified":"2026-02-04T03:01:03.189456Z","published":"2017-07-13T00:00:00Z","related":["USN-3353-1","USN-3353-2","USN-3353-3","USN-3353-4"],"upstream":["CVE-2017-11103"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-11103"},{"type":"REPORT","url":"https://orpheus-lyre.info/"},{"type":"REPORT","url":"https://github.com/heimdal/heimdal/commit/6dd3eb836bbb80a00ffced4ad57077a1cdf227ea"},{"type":"REPORT","url":"https://www.samba.org/samba/security/CVE-2017-11103.html"},{"type":"REPORT","url":"http://www.h5l.org/advisories.html?show=2017-07-11"},{"type":"REPORT","url":"https://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0"},{"type":"REPORT","url":"https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc"},{"type":"REPORT","url":"https://www.orpheus-lyre.info/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3353-2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3353-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3353-3"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3353-4"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-11103"}],"affected":[{"package":{"name":"heimdal","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/heimdal@1.6~git20131207+dfsg-1ubuntu1.2?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6~git20131207+dfsg-1ubuntu1.2"}]}],"versions":["1.6~git20120403+dfsg1-3ubuntu0.1","1.6~git20120403+dfsg1-3ubuntu0.2","1.6~git20131207+dfsg-1ubuntu1","1.6~git20131207+dfsg-1ubuntu1.1"],"ecosystem_specific":{"availability":"No 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