diff options
Diffstat (limited to 'package/network/services/samba36/patches/024-CVE-2016-2111-v3-6.patch')
| -rw-r--r-- | package/network/services/samba36/patches/024-CVE-2016-2111-v3-6.patch | 681 |
1 files changed, 681 insertions, 0 deletions
diff --git a/package/network/services/samba36/patches/024-CVE-2016-2111-v3-6.patch b/package/network/services/samba36/patches/024-CVE-2016-2111-v3-6.patch new file mode 100644 index 0000000..7f7f413 --- /dev/null +++ b/package/network/services/samba36/patches/024-CVE-2016-2111-v3-6.patch @@ -0,0 +1,681 @@ +From ee105156fa151ebfd34b8febc2928e144b3b7b0e Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?G=C3=BCnther=20Deschner?= <gd@samba.org> +Date: Sat, 26 Sep 2015 01:29:10 +0200 +Subject: [PATCH 01/15] CVE-2016-2111: s3:rpc_server/netlogon: always go + through netr_creds_server_step_check() + +The ensures we apply the "server schannel = yes" restrictions. + +BUG: https://bugzilla.samba.org/show_bug.cgi?id=11749 + +Pair-Programmed-With: Stefan Metzmacher <metze@samba.org> + +Signed-off-by: Guenther Deschner <gd@samba.org> +Signed-off-by: Stefan Metzmacher <metze@samba.org> +--- + source3/rpc_server/netlogon/srv_netlog_nt.c | 24 ++++++++++++++---------- + 1 file changed, 14 insertions(+), 10 deletions(-) + +--- a/source3/rpc_server/netlogon/srv_netlog_nt.c ++++ b/source3/rpc_server/netlogon/srv_netlog_nt.c +@@ -1508,6 +1508,7 @@ static NTSTATUS _netr_LogonSamLogon_base + case NetlogonNetworkTransitiveInformation: + { + const char *wksname = nt_workstation; ++ const char *workgroup = lp_workgroup(); + + status = make_auth_context_fixed(talloc_tos(), &auth_context, + logon->network->challenge); +@@ -1532,6 +1533,14 @@ static NTSTATUS _netr_LogonSamLogon_base + logon->network->nt.length)) { + status = NT_STATUS_NO_MEMORY; + } ++ ++ if (NT_STATUS_IS_OK(status)) { ++ status = NTLMv2_RESPONSE_verify_netlogon_creds( ++ user_info->client.account_name, ++ user_info->client.domain_name, ++ user_info->password.response.nt, ++ creds, workgroup); ++ } + break; + } + case NetlogonInteractiveInformation: +@@ -1636,6 +1645,14 @@ static NTSTATUS _netr_LogonSamLogon_base + r->out.validation->sam3); + break; + case 6: ++ /* Only allow this if the pipe is protected. */ ++ if (p->auth.auth_level < DCERPC_AUTH_LEVEL_PRIVACY) { ++ DEBUG(0,("netr_Validation6: client %s not using privacy for netlogon\n", ++ get_remote_machine_name())); ++ status = NT_STATUS_INVALID_PARAMETER; ++ break; ++ } ++ + status = serverinfo_to_SamInfo6(server_info, pipe_session_key, 16, + r->out.validation->sam6); + break; +@@ -2271,11 +2288,13 @@ NTSTATUS _netr_GetForestTrustInformation + + /* TODO: check server name */ + +- status = schannel_check_creds_state(p->mem_ctx, lp_private_dir(), +- r->in.computer_name, +- r->in.credential, +- r->out.return_authenticator, +- &creds); ++ become_root(); ++ status = netr_creds_server_step_check(p, p->mem_ctx, ++ r->in.computer_name, ++ r->in.credential, ++ r->out.return_authenticator, ++ &creds); ++ unbecome_root(); + if (!NT_STATUS_IS_OK(status)) { + return status; + } +@@ -2371,11 +2390,13 @@ NTSTATUS _netr_ServerGetTrustInfo(struct + + /* TODO: check server name */ + +- status = schannel_check_creds_state(p->mem_ctx, lp_private_dir(), +- r->in.computer_name, +- r->in.credential, +- r->out.return_authenticator, +- &creds); ++ become_root(); ++ status = netr_creds_server_step_check(p, p->mem_ctx, ++ r->in.computer_name, ++ r->in.credential, ++ r->out.return_authenticator, ++ &creds); ++ unbecome_root(); + if (!NT_STATUS_IS_OK(status)) { + return status; + } +--- a/source4/torture/rpc/samba3rpc.c ++++ b/source4/torture/rpc/samba3rpc.c +@@ -1122,8 +1122,8 @@ static bool schan(struct torture_context + generate_random_buffer(chal.data, chal.length); + names_blob = NTLMv2_generate_names_blob( + mem_ctx, +- cli_credentials_get_workstation(user_creds), +- cli_credentials_get_domain(user_creds)); ++ cli_credentials_get_workstation(wks_creds), ++ cli_credentials_get_domain(wks_creds)); + status = cli_credentials_get_ntlm_response( + user_creds, mem_ctx, &flags, chal, names_blob, + &lm_resp, &nt_resp, NULL, NULL); +--- a/libcli/auth/proto.h ++++ b/libcli/auth/proto.h +@@ -139,6 +139,11 @@ bool SMBNTLMv2encrypt(TALLOC_CTX *mem_ct + const DATA_BLOB *names_blob, + DATA_BLOB *lm_response, DATA_BLOB *nt_response, + DATA_BLOB *lm_session_key, DATA_BLOB *user_session_key) ; ++NTSTATUS NTLMv2_RESPONSE_verify_netlogon_creds(const char *account_name, ++ const char *account_domain, ++ const DATA_BLOB response, ++ const struct netlogon_creds_CredentialState *creds, ++ const char *workgroup); + + /*********************************************************** + encode a password buffer with a unicode password. The buffer +--- a/libcli/auth/smbencrypt.c ++++ b/libcli/auth/smbencrypt.c +@@ -26,7 +26,7 @@ + #include "../libcli/auth/msrpc_parse.h" + #include "../lib/crypto/crypto.h" + #include "../libcli/auth/libcli_auth.h" +-#include "../librpc/gen_ndr/ntlmssp.h" ++#include "../librpc/gen_ndr/ndr_ntlmssp.h" + + void SMBencrypt_hash(const uint8_t lm_hash[16], const uint8_t *c8, uint8_t p24[24]) + { +@@ -522,6 +522,146 @@ bool SMBNTLMv2encrypt(TALLOC_CTX *mem_ct + lm_response, nt_response, lm_session_key, user_session_key); + } + ++NTSTATUS NTLMv2_RESPONSE_verify_netlogon_creds(const char *account_name, ++ const char *account_domain, ++ const DATA_BLOB response, ++ const struct netlogon_creds_CredentialState *creds, ++ const char *workgroup) ++{ ++ TALLOC_CTX *frame = NULL; ++ /* RespType + HiRespType */ ++ static const char *magic = "\x01\x01"; ++ int cmp; ++ struct NTLMv2_RESPONSE v2_resp; ++ enum ndr_err_code err; ++ const struct AV_PAIR *av_nb_cn = NULL; ++ const struct AV_PAIR *av_nb_dn = NULL; ++ ++ if (response.length < 48) { ++ /* ++ * NTLMv2_RESPONSE has at least 48 bytes. ++ */ ++ return NT_STATUS_OK; ++ } ++ ++ cmp = memcmp(response.data + 16, magic, 2); ++ if (cmp != 0) { ++ /* ++ * It doesn't look like a valid NTLMv2_RESPONSE ++ */ ++ return NT_STATUS_OK; ++ } ++ ++ frame = talloc_stackframe(); ++ ++ err = ndr_pull_struct_blob(&response, frame, &v2_resp, ++ (ndr_pull_flags_fn_t)ndr_pull_NTLMv2_RESPONSE); ++ if (!NDR_ERR_CODE_IS_SUCCESS(err)) { ++ NTSTATUS status; ++ status = ndr_map_error2ntstatus(err); ++ DEBUG(2,("Failed to parse NTLMv2_RESPONSE " ++ "length %u - %s - %s\n", ++ (unsigned)response.length, ++ ndr_map_error2string(err), ++ nt_errstr(status))); ++ dump_data(2, response.data, response.length); ++ TALLOC_FREE(frame); ++ return status; ++ } ++ ++ if (DEBUGLVL(10)) { ++ NDR_PRINT_DEBUG(NTLMv2_RESPONSE, &v2_resp); ++ } ++ ++ /* ++ * Make sure the netbios computer name in the ++ * NTLMv2_RESPONSE matches the computer name ++ * in the secure channel credentials for workstation ++ * trusts. ++ * ++ * And the netbios domain name matches our ++ * workgroup. ++ * ++ * This prevents workstations from requesting ++ * the session key of NTLMSSP sessions of clients ++ * to other hosts. ++ */ ++ if (creds->secure_channel_type == SEC_CHAN_WKSTA) { ++ av_nb_cn = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs, ++ MsvAvNbComputerName); ++ av_nb_dn = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs, ++ MsvAvNbDomainName); ++ } ++ ++ if (av_nb_cn != NULL) { ++ const char *v = NULL; ++ char *a = NULL; ++ size_t len; ++ ++ v = av_nb_cn->Value.AvNbComputerName; ++ ++ a = talloc_strdup(frame, creds->account_name); ++ if (a == NULL) { ++ TALLOC_FREE(frame); ++ return NT_STATUS_NO_MEMORY; ++ } ++ len = strlen(a); ++ if (len > 0 && a[len - 1] == '$') { ++ a[len - 1] = '\0'; ++ } ++ ++#ifdef SAMBA4_INTERNAL_HEIMDAL /* smbtorture4 for make test */ ++ cmp = strcasecmp_m(a, v); ++#else /* smbd */ ++ cmp = StrCaseCmp(a, v); ++#endif ++ if (cmp != 0) { ++ DEBUG(2,("%s: NTLMv2_RESPONSE with " ++ "NbComputerName[%s] rejected " ++ "for user[%s\\%s] " ++ "against SEC_CHAN_WKSTA[%s/%s] " ++ "in workgroup[%s]\n", ++ __func__, v, ++ account_domain, ++ account_name, ++ creds->computer_name, ++ creds->account_name, ++ workgroup)); ++ TALLOC_FREE(frame); ++ return NT_STATUS_LOGON_FAILURE; ++ } ++ } ++ if (av_nb_dn != NULL) { ++ const char *v = NULL; ++ ++ v = av_nb_dn->Value.AvNbDomainName; ++ ++#ifdef SAMBA4_INTERNAL_HEIMDAL /* smbtorture4 for make test */ ++ cmp = strcasecmp_m(workgroup, v); ++#else /* smbd */ ++ cmp = StrCaseCmp(workgroup, v); ++#endif ++ if (cmp != 0) { ++ DEBUG(2,("%s: NTLMv2_RESPONSE with " ++ "NbDomainName[%s] rejected " ++ "for user[%s\\%s] " ++ "against SEC_CHAN_WKSTA[%s/%s] " ++ "in workgroup[%s]\n", ++ __func__, v, ++ account_domain, ++ account_name, ++ creds->computer_name, ++ creds->account_name, ++ workgroup)); ++ TALLOC_FREE(frame); ++ return NT_STATUS_LOGON_FAILURE; ++ } ++ } ++ ++ TALLOC_FREE(frame); ++ return NT_STATUS_OK; ++} ++ + /*********************************************************** + encode a password buffer with a unicode password. The buffer + is filled with random data to make it harder to attack. +--- a/libcli/auth/wscript_build ++++ b/libcli/auth/wscript_build +@@ -19,7 +19,7 @@ bld.SAMBA_SUBSYSTEM('MSRPC_PARSE', + + bld.SAMBA_SUBSYSTEM('LIBCLI_AUTH', + source='credentials.c session.c smbencrypt.c smbdes.c', +- public_deps='MSRPC_PARSE', ++ public_deps='MSRPC_PARSE NDR_NTLMSSP', + public_headers='credentials.h:domain_credentials.h' + ) + +--- a/source3/Makefile.in ++++ b/source3/Makefile.in +@@ -783,6 +783,7 @@ GROUPDB_OBJ = groupdb/mapping.o groupdb/ + PROFILE_OBJ = profile/profile.o + PROFILES_OBJ = utils/profiles.o \ + $(LIBSMB_ERR_OBJ) \ ++ $(LIBNDR_NTLMSSP_OBJ) \ + $(PARAM_OBJ) \ + $(LIB_OBJ) $(LIB_DUMMY_OBJ) \ + $(POPT_LIB_OBJ) \ +@@ -995,10 +996,10 @@ SWAT_OBJ = $(SWAT_OBJ1) $(PARAM_OBJ) $(P + STATUS_OBJ = utils/status.o utils/status_profile.o \ + $(LOCKING_OBJ) $(PARAM_OBJ) \ + $(PROFILE_OBJ) $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) \ +- $(LIBSMB_ERR_OBJ) $(FNAME_UTIL_OBJ) ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) $(FNAME_UTIL_OBJ) + + SMBCONTROL_OBJ = utils/smbcontrol.o $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) \ +- $(LIBSMB_ERR_OBJ) $(POPT_LIB_OBJ) $(PRINTBASE_OBJ) ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) $(POPT_LIB_OBJ) $(PRINTBASE_OBJ) + + SMBTREE_OBJ = utils/smbtree.o $(PARAM_OBJ) \ + $(PROFILE_OBJ) $(LIB_NONSMBD_OBJ) $(LIBSMB_OBJ) \ +@@ -1012,11 +1013,11 @@ SMBTREE_OBJ = utils/smbtree.o $(PARAM_OB + + TESTPARM_OBJ = utils/testparm.o \ + $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) \ +- $(LIBSMB_ERR_OBJ) ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) + + SMBTA_UTIL_OBJ = utils/smbta-util.o $(PARAM_OBJ) $(POPT_LIB_OBJ) \ + $(LIB_NONSMBD_OBJ) \ +- $(LIBSMB_ERR_OBJ) $(FNAME_UTIL_OBJ) ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) $(FNAME_UTIL_OBJ) + + TEST_LP_LOAD_OBJ = param/test_lp_load.o \ + $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) \ +@@ -1146,6 +1147,7 @@ SMBCONFTORT_OBJ = $(SMBCONFTORT_OBJ0) \ + $(LIB_NONSMBD_OBJ) \ + $(PARAM_OBJ) \ + $(LIBSMB_ERR_OBJ) \ ++ $(LIBNDR_NTLMSSP_OBJ) \ + $(POPT_LIB_OBJ) + + PTHREADPOOLTEST_OBJ = lib/pthreadpool/pthreadpool.o \ +@@ -1229,7 +1231,7 @@ CUPS_OBJ = client/smbspool.o $(PARAM_OBJ + $(LIBNDR_GEN_OBJ0) + + NMBLOOKUP_OBJ = utils/nmblookup.o $(PARAM_OBJ) $(LIBNMB_OBJ) \ +- $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) $(LIBSMB_ERR_OBJ) ++ $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) + + SMBTORTURE_OBJ1 = torture/torture.o torture/nbio.o torture/scanner.o torture/utable.o \ + torture/denytest.o torture/mangle_test.o \ +@@ -1253,6 +1255,7 @@ MASKTEST_OBJ = torture/masktest.o $(PARA + $(LIBNDR_GEN_OBJ0) + + MSGTEST_OBJ = torture/msgtest.o $(PARAM_OBJ) $(LIBSMB_ERR_OBJ) \ ++ $(LIBNDR_NTLMSSP_OBJ) \ + $(LIB_NONSMBD_OBJ) \ + $(LIBNDR_GEN_OBJ0) + +@@ -1269,7 +1272,7 @@ PDBTEST_OBJ = torture/pdbtest.o $(PARAM_ + + VFSTEST_OBJ = torture/cmd_vfs.o torture/vfstest.o $(SMBD_OBJ_BASE) $(READLINE_OBJ) + +-SMBICONV_OBJ = $(PARAM_OBJ) torture/smbiconv.o $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) $(LIBSMB_ERR_OBJ) ++SMBICONV_OBJ = $(PARAM_OBJ) torture/smbiconv.o $(LIB_NONSMBD_OBJ) $(POPT_LIB_OBJ) $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) + + LOG2PCAP_OBJ = utils/log2pcaphex.o + +@@ -1297,17 +1300,17 @@ SMBCQUOTAS_OBJ = utils/smbcquotas.o $(LI + EVTLOGADM_OBJ0 = utils/eventlogadm.o + + EVTLOGADM_OBJ = $(EVTLOGADM_OBJ0) $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) \ +- $(LIBSMB_ERR_OBJ) $(LIB_EVENTLOG_OBJ) \ ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) $(LIB_EVENTLOG_OBJ) \ + librpc/gen_ndr/ndr_eventlog.o \ + librpc/gen_ndr/ndr_lsa.o + + SHARESEC_OBJ0 = utils/sharesec.o + SHARESEC_OBJ = $(SHARESEC_OBJ0) $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) \ +- $(LIBSMB_ERR_OBJ) \ ++ $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) \ + $(POPT_LIB_OBJ) + + TALLOCTORT_OBJ = @tallocdir@/testsuite.o @tallocdir@/testsuite_main.o \ +- $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) $(LIBSMB_ERR_OBJ) ++ $(PARAM_OBJ) $(LIB_NONSMBD_OBJ) $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) + + REPLACETORT_OBJ = @libreplacedir@/test/testsuite.o \ + @libreplacedir@/test/getifaddrs.o \ +@@ -1323,7 +1326,7 @@ SMBFILTER_OBJ = utils/smbfilter.o $(PARA + $(LIBNDR_GEN_OBJ0) + + WINBIND_WINS_NSS_OBJ = ../nsswitch/wins.o $(PARAM_OBJ) \ +- $(LIB_NONSMBD_OBJ) $(LIBSMB_ERR_OBJ) $(LIBNMB_OBJ) ++ $(LIB_NONSMBD_OBJ) $(LIBSMB_ERR_OBJ) $(LIBNDR_NTLMSSP_OBJ) $(LIBNMB_OBJ) + + PAM_SMBPASS_OBJ_0 = pam_smbpass/pam_smb_auth.o pam_smbpass/pam_smb_passwd.o \ + pam_smbpass/pam_smb_acct.o pam_smbpass/support.o ../lib/util/asn1.o +@@ -1531,12 +1534,14 @@ RPC_OPEN_TCP_OBJ = torture/rpc_open_tcp. + DBWRAP_TOOL_OBJ = utils/dbwrap_tool.o \ + $(PARAM_OBJ) \ + $(LIB_NONSMBD_OBJ) \ +- $(LIBSMB_ERR_OBJ) ++ $(LIBSMB_ERR_OBJ) \ ++ $(LIBNDR_NTLMSSP_OBJ) + + DBWRAP_TORTURE_OBJ = utils/dbwrap_torture.o \ + $(PARAM_OBJ) \ + $(LIB_NONSMBD_OBJ) \ + $(LIBSMB_ERR_OBJ) \ ++ $(LIBNDR_NTLMSSP_OBJ) \ + $(POPT_LIB_OBJ) + + SPLIT_TOKENS_OBJ = utils/split_tokens.o \ +--- a/source4/torture/raw/samba3misc.c ++++ b/source4/torture/raw/samba3misc.c +@@ -340,6 +340,7 @@ bool torture_samba3_badpath(struct tortu + bool ret = true; + TALLOC_CTX *mem_ctx; + bool nt_status_support; ++ bool client_ntlmv2_auth; + + if (!(mem_ctx = talloc_init("torture_samba3_badpath"))) { + d_printf("talloc_init failed\n"); +@@ -347,20 +348,17 @@ bool torture_samba3_badpath(struct tortu + } + + nt_status_support = lpcfg_nt_status_support(torture->lp_ctx); ++ client_ntlmv2_auth = lpcfg_client_ntlmv2_auth(torture->lp_ctx); + +- if (!lpcfg_set_cmdline(torture->lp_ctx, "nt status support", "yes")) { +- printf("Could not set 'nt status support = yes'\n"); +- goto fail; +- } ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "nt status support", "yes"), ret, fail, "Could not set 'nt status support = yes'\n"); ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "client ntlmv2 auth", "yes"), ret, fail, "Could not set 'client ntlmv2 auth = yes'\n"); + + if (!torture_open_connection(&cli_nt, torture, 0)) { + goto fail; + } + +- if (!lpcfg_set_cmdline(torture->lp_ctx, "nt status support", "no")) { +- printf("Could not set 'nt status support = yes'\n"); +- goto fail; +- } ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "nt status support", "no"), ret, fail, "Could not set 'nt status support = no'\n"); ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "client ntlmv2 auth", "no"), ret, fail, "Could not set 'client ntlmv2 auth = no'\n"); + + if (!torture_open_connection(&cli_dos, torture, 1)) { + goto fail; +@@ -373,6 +371,12 @@ bool torture_samba3_badpath(struct tortu + } + + smbcli_deltree(cli_nt->tree, dirname); ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "nt status support", ++ nt_status_support ? "yes":"no"), ++ ret, fail, "Could not set 'nt status support' back to where it was\n"); ++ torture_assert_goto(torture, lpcfg_set_cmdline(torture->lp_ctx, "client ntlmv2 auth", ++ client_ntlmv2_auth ? "yes":"no"), ++ ret, fail, "Could not set 'client ntlmv2 auth' back to where it was\n"); + + status = smbcli_mkdir(cli_nt->tree, dirname); + if (!NT_STATUS_IS_OK(status)) { +--- a/source4/torture/basic/base.c ++++ b/source4/torture/basic/base.c +@@ -1476,6 +1476,7 @@ static bool torture_chkpath_test(struct + static bool torture_samba3_errorpaths(struct torture_context *tctx) + { + bool nt_status_support; ++ bool client_ntlmv2_auth; + struct smbcli_state *cli_nt = NULL, *cli_dos = NULL; + bool result = false; + int fnum; +@@ -1485,18 +1486,27 @@ static bool torture_samba3_errorpaths(st + NTSTATUS status; + + nt_status_support = lpcfg_nt_status_support(tctx->lp_ctx); ++ client_ntlmv2_auth = lpcfg_client_ntlmv2_auth(tctx->lp_ctx); + + if (!lpcfg_set_cmdline(tctx->lp_ctx, "nt status support", "yes")) { + torture_comment(tctx, "Could not set 'nt status support = yes'\n"); + goto fail; + } ++ if (!lpcfg_set_cmdline(tctx->lp_ctx, "client ntlmv2 auth", "yes")) { ++ torture_result(tctx, TORTURE_FAIL, "Could not set 'client ntlmv2 auth = yes'\n"); ++ goto fail; ++ } + + if (!torture_open_connection(&cli_nt, tctx, 0)) { + goto fail; + } + + if (!lpcfg_set_cmdline(tctx->lp_ctx, "nt status support", "no")) { +- torture_comment(tctx, "Could not set 'nt status support = yes'\n"); ++ torture_result(tctx, TORTURE_FAIL, "Could not set 'nt status support = no'\n"); ++ goto fail; ++ } ++ if (!lpcfg_set_cmdline(tctx->lp_ctx, "client ntlmv2 auth", "no")) { ++ torture_result(tctx, TORTURE_FAIL, "Could not set 'client ntlmv2 auth = no'\n"); + goto fail; + } + +@@ -1506,7 +1516,12 @@ static bool torture_samba3_errorpaths(st + + if (!lpcfg_set_cmdline(tctx->lp_ctx, "nt status support", + nt_status_support ? "yes":"no")) { +- torture_comment(tctx, "Could not reset 'nt status support = yes'"); ++ torture_result(tctx, TORTURE_FAIL, "Could not reset 'nt status support'"); ++ goto fail; ++ } ++ if (!lpcfg_set_cmdline(tctx->lp_ctx, "client ntlmv2 auth", ++ client_ntlmv2_auth ? "yes":"no")) { ++ torture_result(tctx, TORTURE_FAIL, "Could not reset 'client ntlmv2 auth'"); + goto fail; + } + +--- a/source3/libsmb/cliconnect.c ++++ b/source3/libsmb/cliconnect.c +@@ -2077,6 +2077,17 @@ NTSTATUS cli_session_setup(struct cli_st + NTSTATUS status; + + /* otherwise do a NT1 style session setup */ ++ if (lp_client_ntlmv2_auth() && lp_client_use_spnego()) { ++ /* ++ * Don't send an NTLMv2 response without NTLMSSP ++ * if we want to use spnego support ++ */ ++ DEBUG(1, ("Server does not support EXTENDED_SECURITY " ++ " but 'client use spnego = yes" ++ " and 'client ntlmv2 auth = yes'\n")); ++ return NT_STATUS_ACCESS_DENIED; ++ } ++ + status = cli_session_setup_nt1(cli, user, pass, passlen, + ntpass, ntpasslen, workgroup); + if (!NT_STATUS_IS_OK(status)) { +--- a/docs-xml/smbdotconf/protocol/clientusespnego.xml ++++ b/docs-xml/smbdotconf/protocol/clientusespnego.xml +@@ -9,6 +9,11 @@ + supporting servers (including WindowsXP, Windows2000 and Samba + 3.0) to agree upon an authentication + mechanism. This enables Kerberos authentication in particular.</para> ++ ++ <para>When <smbconfoption name="client NTLMv2 auth"/> is also set to ++ <constant>yes</constant> extended security (SPNEGO) is required ++ in order to use NTLMv2 only within NTLMSSP. This behavior was ++ introduced with the patches for CVE-2016-2111.</para> + </description> + + <value type="default">yes</value> +--- a/docs-xml/smbdotconf/security/clientntlmv2auth.xml ++++ b/docs-xml/smbdotconf/security/clientntlmv2auth.xml +@@ -28,6 +28,11 @@ + NTLMv2 by default, and some sites (particularly those following + 'best practice' security polices) only allow NTLMv2 responses, and + not the weaker LM or NTLM.</para> ++ ++ <para>When <smbconfoption name="client use spnego"/> is also set to ++ <constant>yes</constant> extended security (SPNEGO) is required ++ in order to use NTLMv2 only within NTLMSSP. This behavior was ++ introduced with the patches for CVE-2016-2111.</para> + </description> + <value type="default">yes</value> + </samba:parameter> +--- /dev/null ++++ b/docs-xml/smbdotconf/security/rawntlmv2auth.xml +@@ -0,0 +1,19 @@ ++<samba:parameter name="raw NTLMv2 auth" ++ context="G" ++ type="boolean" ++ xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> ++<description> ++ <para>This parameter determines whether or not <citerefentry><refentrytitle>smbd</refentrytitle> ++ <manvolnum>8</manvolnum></citerefentry> will allow SMB1 clients without ++ extended security (without SPNEGO) to use NTLMv2 authentication.</para> ++ ++ <para>If this option, <command moreinfo="none">lanman auth</command> ++ and <command moreinfo="none">ntlm auth</command> are all disabled, ++ then only clients with SPNEGO support will be permitted. ++ That means NTLMv2 is only supported within NTLMSSP.</para> ++</description> ++ ++<related>lanman auth</related> ++<related>ntlm auth</related> ++<value type="default">no</value> ++</samba:parameter> +--- a/source3/include/proto.h ++++ b/source3/include/proto.h +@@ -1489,6 +1489,7 @@ bool lp_map_untrusted_to_domain(void); + int lp_restrict_anonymous(void); + bool lp_lanman_auth(void); + bool lp_ntlm_auth(void); ++bool lp_raw_ntlmv2_auth(void); + bool lp_client_plaintext_auth(void); + bool lp_client_lanman_auth(void); + bool lp_client_ntlmv2_auth(void); +--- a/source3/param/loadparm.c ++++ b/source3/param/loadparm.c +@@ -336,6 +336,7 @@ struct global { + bool bAllowTrustedDomains; + bool bLanmanAuth; + bool bNTLMAuth; ++ bool bRawNTLMv2Auth; + bool bUseSpnego; + bool bClientLanManAuth; + bool bClientNTLMv2Auth; +@@ -1383,6 +1384,15 @@ static struct parm_struct parm_table[] = + .flags = FLAG_ADVANCED, + }, + { ++ .label = "raw NTLMv2 auth", ++ .type = P_BOOL, ++ .p_class = P_GLOBAL, ++ .ptr = &Globals.bRawNTLMv2Auth, ++ .special = NULL, ++ .enum_list = NULL, ++ .flags = FLAG_ADVANCED, ++ }, ++ { + .label = "client NTLMv2 auth", + .type = P_BOOL, + .p_class = P_GLOBAL, +@@ -5337,6 +5347,7 @@ static void init_globals(bool reinit_glo + Globals.bClientPlaintextAuth = False; /* Do NOT use a plaintext password even if is requested by the server */ + Globals.bLanmanAuth = False; /* Do NOT use the LanMan hash, even if it is supplied */ + Globals.bNTLMAuth = True; /* Do use NTLMv1 if it is supplied by the client (otherwise NTLMv2) */ ++ Globals.bRawNTLMv2Auth = false; /* Allow NTLMv2 without NTLMSSP */ + Globals.bClientNTLMv2Auth = True; /* Client should always use use NTLMv2, as we can't tell that the server supports it, but most modern servers do */ + /* Note, that we will also use NTLM2 session security (which is different), if it is available */ + +@@ -5819,6 +5830,7 @@ FN_GLOBAL_BOOL(lp_map_untrusted_to_domai + FN_GLOBAL_INTEGER(lp_restrict_anonymous, &Globals.restrict_anonymous) + FN_GLOBAL_BOOL(lp_lanman_auth, &Globals.bLanmanAuth) + FN_GLOBAL_BOOL(lp_ntlm_auth, &Globals.bNTLMAuth) ++FN_GLOBAL_BOOL(lp_raw_ntlmv2_auth, &Globals.bRawNTLMv2Auth) + FN_GLOBAL_BOOL(lp_client_plaintext_auth, &Globals.bClientPlaintextAuth) + FN_GLOBAL_BOOL(lp_client_lanman_auth, &Globals.bClientLanManAuth) + FN_GLOBAL_BOOL(lp_client_ntlmv2_auth, &Globals.bClientNTLMv2Auth) +--- a/source3/auth/auth_util.c ++++ b/source3/auth/auth_util.c +@@ -30,6 +30,7 @@ + #include "../lib/util/util_pw.h" + #include "lib/winbind_util.h" + #include "passdb.h" ++#include "../lib/tsocket/tsocket.h" + + #undef DBGC_CLASS + #define DBGC_CLASS DBGC_AUTH +@@ -367,6 +368,19 @@ NTSTATUS make_user_info_for_reply_enc(st + const char *client_domain, + DATA_BLOB lm_resp, DATA_BLOB nt_resp) + { ++ bool allow_raw = lp_raw_ntlmv2_auth(); ++ ++ if (!allow_raw && nt_resp.length >= 48) { ++ /* ++ * NTLMv2_RESPONSE has at least 48 bytes ++ * and should only be supported via NTLMSSP. ++ */ ++ DEBUG(2,("Rejecting raw NTLMv2 authentication with " ++ "user [%s\\%s]\n", ++ client_domain, smb_name)); ++ return NT_STATUS_INVALID_PARAMETER; ++ } ++ + return make_user_info_map(user_info, smb_name, + client_domain, + get_remote_machine_name(), +--- a/selftest/target/Samba3.pm ++++ b/selftest/target/Samba3.pm +@@ -127,6 +127,7 @@ sub setup_dc($$) + domain master = yes + domain logons = yes + lanman auth = yes ++ raw NTLMv2 auth = yes + "; + + my $vars = $self->provision($path, +@@ -230,6 +231,7 @@ sub setup_secserver($$$) + my $secserver_options = " + security = server + password server = $s3dcvars->{SERVER_IP} ++ client ntlmv2 auth = no + "; + + my $ret = $self->provision($prefix, |