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From: =?utf-8?q?Guido_G=C3=BCnther?= <agx@sigxcpu.org>
Date: Wed, 28 Dec 2016 19:21:49 +0100
Subject: security-CVE-2016-2125: Don't pass GSS_C_DELEG_FLAG by default
This is a backport of upstream commits
b1a056f77e793efc45df34ab7bf78fbec1bf8a59
b83897ae49fdee1fda73c10c7fe73362bfaba690 (code not used in wheezy)
3106964a640ddf6a3c08c634ff586a814f94dff8 (code not used in wheezy)
---
source3/librpc/crypto/gse.c | 1 -
source3/libsmb/clifsinfo.c | 2 +-
source4/auth/gensec/gensec_gssapi.c | 2 +-
source4/scripting/bin/nsupdate-gss | 2 +-
4 files changed, 3 insertions(+), 4 deletions(-)
--- a/source3/librpc/crypto/gse.c
+++ b/source3/librpc/crypto/gse.c
@@ -162,7 +162,6 @@ static NTSTATUS gse_context_init(TALLOC_
memcpy(&gse_ctx->gss_mech, gss_mech_krb5, sizeof(gss_OID_desc));
gse_ctx->gss_c_flags = GSS_C_MUTUAL_FLAG |
- GSS_C_DELEG_FLAG |
GSS_C_DELEG_POLICY_FLAG |
GSS_C_REPLAY_FLAG |
GSS_C_SEQUENCE_FLAG;
--- a/source3/libsmb/clifsinfo.c
+++ b/source3/libsmb/clifsinfo.c
@@ -726,7 +726,7 @@ static NTSTATUS make_cli_gss_blob(TALLOC
&es->s.gss_state->gss_ctx,
srv_name,
GSS_C_NO_OID, /* default OID. */
- GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_DELEG_FLAG,
+ GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_DELEG_POLICY_FLAG,
GSS_C_INDEFINITE, /* requested ticket lifetime. */
NULL, /* no channel bindings */
p_tok_in,
--- a/source4/auth/gensec/gensec_gssapi.c
+++ b/source4/auth/gensec/gensec_gssapi.c
@@ -172,7 +172,7 @@ static NTSTATUS gensec_gssapi_start(stru
if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "mutual", true)) {
gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
}
- if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", true)) {
+ if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", false)) {
gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
}
if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "replay", true)) {
--- a/source4/scripting/bin/nsupdate-gss
+++ b/source4/scripting/bin/nsupdate-gss
@@ -178,7 +178,7 @@ sub negotiate_tkey($$$$)
my $flags =
GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG |
GSS_C_SEQUENCE_FLAG | GSS_C_CONF_FLAG |
- GSS_C_INTEG_FLAG | GSS_C_DELEG_FLAG;
+ GSS_C_INTEG_FLAG;
$status = GSSAPI::Cred::acquire_cred(undef, 120, undef, GSS_C_INITIATE,
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