--- Begin Message ---
Package: release.debian.org
Severity: normal
User: [email protected]
Usertags: unblock
Please unblock package heimdal
Security update from upstream. For CVE-2017-6594. Seee
https://www.h5l.org/releases.html?show=7.3.0
diff -Nru heimdal-7.1.0+dfsg/debian/changelog
heimdal-7.1.0+dfsg/debian/changelog
--- heimdal-7.1.0+dfsg/debian/changelog 2017-04-08 11:38:13.000000000 +1000
+++ heimdal-7.1.0+dfsg/debian/changelog 2017-04-10 17:21:35.000000000 +1000
@@ -1,3 +1,9 @@
+heimdal (7.1.0+dfsg-12) unstable; urgency=high
+
+ * Fix transit path validation CVE-2017-6594.
+
+ -- Brian May <[email protected]> Mon, 10 Apr 2017 17:21:35 +1000
+
heimdal (7.1.0+dfsg-11) unstable; urgency=medium
* Remove legacy provides/conflicts/replaces headers. Old daemons
diff -Nru heimdal-7.1.0+dfsg/debian/patches/CVE-2017-6594
heimdal-7.1.0+dfsg/debian/patches/CVE-2017-6594
--- heimdal-7.1.0+dfsg/debian/patches/CVE-2017-6594 1970-01-01
10:00:00.000000000 +1000
+++ heimdal-7.1.0+dfsg/debian/patches/CVE-2017-6594 2017-04-10
17:21:35.000000000 +1000
@@ -0,0 +1,163 @@
+commit d7bf245e793a9f9ec565e07dae9372597c0ece69
+Author: Viktor Dukhovni <[email protected]>
+Date: Wed Aug 10 23:31:14 2016 +0000
+
+ Fix transit path validation CVE-2017-6594
+
+ Commit f469fc6 (2010-10-02) inadvertently caused the previous hop realm
+ to not be added to the transit path of issued tickets. This may, in
+ some cases, enable bypass of capath policy in Heimdal versions 1.5
+ through 7.2.
+
+ Note, this may break sites that rely on the bug. With the bug some
+ incomplete [capaths] worked, that should not have. These may now break
+ authentication in some cross-realm configurations.
+
+diff --git a/kdc/krb5tgs.c b/kdc/krb5tgs.c
+index 6048b9c55..98503812f 100644
+--- a/kdc/krb5tgs.c
++++ b/kdc/krb5tgs.c
+@@ -655,8 +655,12 @@ fix_transited_encoding(krb5_context context,
+ "Decoding transited encoding");
+ return ret;
+ }
++
++ /*
++ * If the realm of the presented tgt is neither the client nor the server
++ * realm, it is a transit realm and must be added to transited set.
++ */
+ if(strcmp(client_realm, tgt_realm) && strcmp(server_realm, tgt_realm)) {
+- /* not us, so add the previous realm to transited set */
+ if (num_realms + 1 > UINT_MAX/sizeof(*realms)) {
+ ret = ERANGE;
+ goto free_realms;
+@@ -737,6 +741,7 @@ tgs_make_reply(krb5_context context,
+ const char *server_name,
+ hdb_entry_ex *client,
+ krb5_principal client_principal,
++ const char *tgt_realm,
+ hdb_entry_ex *krbtgt,
+ krb5_enctype krbtgt_etype,
+ krb5_principals spp,
+@@ -798,7 +803,7 @@ tgs_make_reply(krb5_context context,
+ &tgt->transited, &et,
+ krb5_principal_get_realm(context,
client_principal),
+ krb5_principal_get_realm(context,
server->entry.principal),
+- krb5_principal_get_realm(context,
krbtgt->entry.principal));
++ tgt_realm);
+ if(ret)
+ goto out;
+
+@@ -1519,6 +1524,8 @@ tgs_build_reply(krb5_context context,
+ krb5_keyblock sessionkey;
+ krb5_kvno kvno;
+ krb5_data rspac;
++ const char *tgt_realm = /* Realm of TGT issuer */
++ krb5_principal_get_realm(context, krbtgt->entry.principal);
+ const char *our_realm = /* Realm of this KDC */
+ krb5_principal_get_comp_string(context, krbtgt->entry.principal, 1);
+ char **capath = NULL;
+@@ -2324,6 +2331,7 @@ server_lookup:
+ spn,
+ client,
+ cp,
++ tgt_realm,
+ krbtgt_out,
+ tkey_sign->key.keytype,
+ spp,
+diff --git a/tests/kdc/check-kdc.in b/tests/kdc/check-kdc.in
+index 235113425..f6e78ccac 100644
+--- a/tests/kdc/check-kdc.in
++++ b/tests/kdc/check-kdc.in
+@@ -53,6 +53,7 @@ R4=TEST4.H5L.SE
+ R5=SOME-REALM5.FR
+ R6=SOME-REALM6.US
+ R7=SOME-REALM7.UK
++R8=SOME-REALM8.UK
+
+ H1=H1.$R
+ H2=H2.$R
+@@ -152,6 +153,12 @@ ${kadmin} \
+ init \
+ --realm-max-ticket-life=1day \
+ --realm-max-renewable-life=1month \
++ ${R8} || exit 1
++
++${kadmin} \
++ init \
++ --realm-max-ticket-life=1day \
++ --realm-max-renewable-life=1month \
+ ${H1} || exit 1
+
+ ${kadmin} \
+@@ -191,6 +198,7 @@ ${kadmin} add -p foo --use-defaults foo@${R4} || exit 1
+ ${kadmin5} add -p foo --use-defaults foo@${R5} || exit 1
+ ${kadmin} add -p foo --use-defaults foo@${R6} || exit 1
+ ${kadmin} add -p foo --use-defaults foo@${R7} || exit 1
++${kadmin} add -p foo --use-defaults foo@${R8} || exit 1
+ ${kadmin} add -p foo --use-defaults foo@${H1} || exit 1
+ ${kadmin} add -p foo --use-defaults foo/host.${h1}@${H1} || exit 1
+ ${kadmin} add -p foo --use-defaults foo@${H2} || exit 1
+@@ -249,6 +257,9 @@ ${kadmin} add -p cross2 --use-defaults krbtgt/${R5}@${R6}
|| exit 1
+ ${kadmin} add -p cross1 --use-defaults krbtgt/${R7}@${R6} || exit 1
+ ${kadmin} add -p cross2 --use-defaults krbtgt/${R6}@${R7} || exit 1
+
++${kadmin} add -p cross1 --use-defaults krbtgt/${R8}@${R6} || exit 1
++${kadmin} add -p cross2 --use-defaults krbtgt/${R6}@${R8} || exit 1
++
+ ${kadmin} add -p cross1 --use-defaults krbtgt/${H1}@${R} || exit 1
+ ${kadmin} add -p cross2 --use-defaults krbtgt/${R}@${H1} || exit 1
+
+@@ -284,6 +295,7 @@ ${kadmin} check ${R4} || exit 1
+ ${kadmin5} check ${R5} || exit 1
+ ${kadmin} check ${R6} || exit 1
+ ${kadmin} check ${R7} || exit 1
++${kadmin} check ${R8} || exit 1
+ ${kadmin} check ${H1} || exit 1
+ ${kadmin} check ${H2} || exit 1
+ ${kadmin} check ${H3} || exit 1
+@@ -388,6 +400,8 @@ echo "Getting x-realm tickets with capaths for $R -> $R6"
+ ${kgetcred} foo@${R6} || { ec=1 ; eval "${testfailed}"; }
+ echo "Getting x-realm tickets with capaths for $R -> $R7"
+ ${kgetcred} foo@${R7} || { ec=1 ; eval "${testfailed}"; }
++echo "Should not get x-realm tickets with capaths for $R -> $R8"
++${kgetcred} foo@${R8} && { ec=1 ; eval "${testfailed}"; }
+ ${kdestroy}
+
+ echo "Testing capaths logic (reverse order)"
+@@ -418,10 +432,13 @@ ${kinit} --password-file=${objdir}/foopassword \
+
+ echo "Getting x-realm tickets with hierarchical referrals for $H3 -> $H1"
+ ${kgetcred} --hostbased --canonicalize foo host.${h1} || { ec=1 ; eval
"${testfailed}"; }
++fgrep "cross-realm ${H3} -> ${H1} via [${H2}, ${R}]" messages.log > /dev/null
|| { ec=1 ; eval "${testfailed}"; }
+ echo "Getting x-realm tickets with hierarchical referrals for $H3 -> $R"
+ ${kgetcred} --hostbased --canonicalize foo host.${r} || { ec=1 ; eval
"${testfailed}"; }
++fgrep "cross-realm ${H3} -> ${R} via [${H2}]" messages.log > /dev/null || {
ec=1 ; eval "${testfailed}"; }
+ echo "Getting x-realm tickets with hierarchical referrals for $H3 -> $H2"
+ ${kgetcred} --hostbased --canonicalize foo host.${h2} || { ec=1 ; eval
"${testfailed}"; }
++fgrep "cross-realm ${H3} -> ${H2}" messages.log > /dev/null || { ec=1 ; eval
"${testfailed}"; }
+ ${kdestroy}
+
+ echo "Testing multi-hop [capaths] referral logic"
+diff --git a/tests/kdc/krb5.conf.in b/tests/kdc/krb5.conf.in
+index cc2dedb2d..849e773d0 100644
+--- a/tests/kdc/krb5.conf.in
++++ b/tests/kdc/krb5.conf.in
+@@ -40,6 +40,9 @@
+ SOME-REALM7.UK = {
+ kdc = localhost:@port@
+ }
++ SOME-REALM8.UK = {
++ kdc = localhost:@port@
++ }
+ TEST-HTTP.H5L.SE = {
+ kdc = http/localhost:@port@
+ }
+@@ -147,6 +150,7 @@
+ SOME-REALM6.US = SOME-REALM5.FR
+ SOME-REALM7.UK = SOME-REALM6.US
+ SOME-REALM7.UK = SOME-REALM5.FR
++ SOME-REALM8.UK = SOME-REALM6.US
+ }
+ H4.H2.TEST.H5L.SE = {
+ H1.TEST.H5L.SE = H3.H2.TEST.H5L.SE
diff -Nru heimdal-7.1.0+dfsg/debian/patches/series
heimdal-7.1.0+dfsg/debian/patches/series
--- heimdal-7.1.0+dfsg/debian/patches/series 2017-04-08 11:38:13.000000000
+1000
+++ heimdal-7.1.0+dfsg/debian/patches/series 2017-04-10 17:21:35.000000000
+1000
@@ -14,3 +14,4 @@
check_iprop_races
disable_iprop
canonical_host
+CVE-2017-6594
unblock heimdal/7.1.0+dfsg-12
-- System Information:
Debian Release: 9.0
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (100,
'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.9.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
--- End Message ---
