Date: Wed, 12 Jul 2017 07:26:07 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r320907 - in stable: 10/crypto/heimdal/lib/krb5 11/crypto/heimdal/lib/krb5 Message-ID: <201707120726.v6C7Q78c041105@repo.freebsd.org>
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Author: delphij Date: Wed Jul 12 07:26:07 2017 New Revision: 320907 URL: https://svnweb.freebsd.org/changeset/base/320907 Log: 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 Modified: stable/11/crypto/heimdal/lib/krb5/ticket.c Directory Properties: stable/11/ (props changed) Changes in other areas also in this revision: Modified: stable/10/crypto/heimdal/lib/krb5/ticket.c Directory Properties: stable/10/ (props changed) Modified: stable/11/crypto/heimdal/lib/krb5/ticket.c ============================================================================== --- stable/11/crypto/heimdal/lib/krb5/ticket.c Wed Jul 12 07:19:06 2017 (r320906) +++ stable/11/crypto/heimdal/lib/krb5/ticket.c Wed Jul 12 07:26:07 2017 (r320907) @@ -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){
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