svn commit: r320910 - releng/11.1/crypto/heimdal/lib/krb5

[Xin LI]

Author: delphij
Date: Wed Jul 12 08:07:16 2017
New Revision: 320910
URL: https://svnweb.freebsd.org/changeset/base/320910

Log:
  MFS r320907: MFC r320906: MFV r320905: Import upstream fix for
  CVE-2017-11103.
  
  In _krb5_extract_ticket() the KDC-REP service name must be obtained
  from encrypted version stored in 'enc_part' instead of the unencrypted
  version stored in 'ticket'.  Use of the unecrypted version provides an
  opportunity for successful server impersonation and other attacks.
  
  Submitted by:	hrs
  Obtained from:	Heimdal
  Security:	FreeBSD-SA-17:05.heimdal
  Security:	CVE-2017-11103
  Approved by:	re (kib)

Modified:
  releng/11.1/crypto/heimdal/lib/krb5/ticket.c
Directory Properties:
  releng/11.1/   (props changed)

Modified: releng/11.1/crypto/heimdal/lib/krb5/ticket.c
==============================================================================
--- releng/11.1/crypto/heimdal/lib/krb5/ticket.c	Wed Jul 12 07:31:28 2017	(r320909)
+++ releng/11.1/crypto/heimdal/lib/krb5/ticket.c	Wed Jul 12 08:07:16 2017	(r320910)
@@ -713,8 +713,8 @@ _krb5_extract_ticket(krb5_context context,
     /* check server referral and save principal */
     ret = _krb5_principalname2krb5_principal (context,
 					      &tmp_principal,
-					      rep->kdc_rep.ticket.sname,
-					      rep->kdc_rep.ticket.realm);
+					      rep->enc_part.sname,
+					      rep->enc_part.srealm);
     if (ret)
 	goto out;
     if((flags & EXTRACT_TICKET_ALLOW_SERVER_MISMATCH) == 0){