[Pkg-samba-maint] [samba] 02/04: CVE-2017-11103: Orpheus' Lyre KDC-REP service name validation

[Mathieu Parent]

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sathieu pushed a commit to branch master
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commit 4612cdd505ed1a88035265456dc1809c0cbf6f76
Author: Jeffrey Altman <jaltman at secure-endpoints.com>
Date:   Wed Apr 12 15:40:42 2017 -0400

    CVE-2017-11103: Orpheus' Lyre KDC-REP service name validation
    
    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.
    
    Identified by Jeffrey Altman, Viktor Duchovni and Nico Williams.
    
    Change-Id: I45ef61e8a46e0f6588d64b5bd572a24c7432547c
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=12894
    (based on heimdal commit 6dd3eb836bbb80a00ffced4ad57077a1cdf227ea)
    
    Signed-off-by: Andrew Bartlett <abartlet at samba.org>
    Reviewed-by: Garming Sam <garming at catalyst.net.nz>
    Reviewed-by: Stefan Metzmacher <metze at samba.org>
    (cherry picked from commit 9b0972c8e429fee8e15f23ab508a9f0729a4e0b6)
---
 source4/heimdal/lib/krb5/ticket.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source4/heimdal/lib/krb5/ticket.c b/source4/heimdal/lib/krb5/ticket.c
index 064bbfb..5a317c7 100644
--- a/source4/heimdal/lib/krb5/ticket.c
+++ b/source4/heimdal/lib/krb5/ticket.c
@@ -641,8 +641,8 @@ _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){

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