| 1 |
From be03c9118e812f93d50c71294fbf9f12bcf2a7f1 Mon Sep 17 00:00:00 2001 |
| 2 |
From: Stefan Metzmacher <metze@samba.org> |
| 3 |
Date: Mon, 14 Aug 2017 12:13:18 +0200 |
| 4 |
Subject: [PATCH 1/2] CVE-2017-12151: s3:libsmb: add |
| 5 |
cli_state_is_encryption_on() helper function |
| 6 |
|
| 7 |
This allows to check if the current cli_state uses encryption |
| 8 |
(either via unix extentions or via SMB3). |
| 9 |
|
| 10 |
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12996 |
| 11 |
|
| 12 |
Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 13 |
--- |
| 14 |
source3/libsmb/clientgen.c | 13 +++++++++++++ |
| 15 |
source3/libsmb/proto.h | 1 + |
| 16 |
2 files changed, 14 insertions(+) |
| 17 |
|
| 18 |
diff --git a/source3/libsmb/clientgen.c b/source3/libsmb/clientgen.c |
| 19 |
index bc5c1b1ce3c..3e8523e5ce8 100644 |
| 20 |
--- a/source3/libsmb/clientgen.c |
| 21 |
+++ b/source3/libsmb/clientgen.c |
| 22 |
@@ -339,6 +339,19 @@ uint32_t cli_getpid(struct cli_state *cli) |
| 23 |
return cli->smb1.pid; |
| 24 |
} |
| 25 |
|
| 26 |
+bool cli_state_is_encryption_on(struct cli_state *cli) |
| 27 |
+{ |
| 28 |
+ if (smbXcli_conn_protocol(cli->conn) < PROTOCOL_SMB2_02) { |
| 29 |
+ return smb1cli_conn_encryption_on(cli->conn); |
| 30 |
+ } |
| 31 |
+ |
| 32 |
+ if (cli->smb2.tcon == NULL) { |
| 33 |
+ return false; |
| 34 |
+ } |
| 35 |
+ |
| 36 |
+ return smb2cli_tcon_is_encryption_on(cli->smb2.tcon); |
| 37 |
+} |
| 38 |
+ |
| 39 |
bool cli_state_has_tcon(struct cli_state *cli) |
| 40 |
{ |
| 41 |
uint16_t tid = cli_state_get_tid(cli); |
| 42 |
diff --git a/source3/libsmb/proto.h b/source3/libsmb/proto.h |
| 43 |
index 764f3fc1b12..67fa43e4e4a 100644 |
| 44 |
--- a/source3/libsmb/proto.h |
| 45 |
+++ b/source3/libsmb/proto.h |
| 46 |
@@ -195,6 +195,7 @@ const char *cli_state_remote_realm(struct cli_state *cli); |
| 47 |
uint16_t cli_state_get_vc_num(struct cli_state *cli); |
| 48 |
uint32_t cli_setpid(struct cli_state *cli, uint32_t pid); |
| 49 |
uint32_t cli_getpid(struct cli_state *cli); |
| 50 |
+bool cli_state_is_encryption_on(struct cli_state *cli); |
| 51 |
bool cli_state_has_tcon(struct cli_state *cli); |
| 52 |
uint16_t cli_state_get_tid(struct cli_state *cli); |
| 53 |
uint16_t cli_state_set_tid(struct cli_state *cli, uint16_t tid); |
| 54 |
-- |
| 55 |
2.13.5 |
| 56 |
|
| 57 |
|
| 58 |
From 16d3c8288ae78a686715c242293691c00ec6d7a5 Mon Sep 17 00:00:00 2001 |
| 59 |
From: Stefan Metzmacher <metze@samba.org> |
| 60 |
Date: Sat, 17 Dec 2016 10:36:49 +0100 |
| 61 |
Subject: [PATCH 2/2] CVE-2017-12151: s3:libsmb: make use of |
| 62 |
cli_state_is_encryption_on() |
| 63 |
|
| 64 |
This will keep enforced encryption across dfs referrals. |
| 65 |
|
| 66 |
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12996 |
| 67 |
|
| 68 |
Signed-off-by: Stefan Metzmacher <metze@samba.org> |
| 69 |
--- |
| 70 |
source3/libsmb/clidfs.c | 4 ++-- |
| 71 |
source3/libsmb/libsmb_context.c | 2 +- |
| 72 |
2 files changed, 3 insertions(+), 3 deletions(-) |
| 73 |
|
| 74 |
diff --git a/source3/libsmb/clidfs.c b/source3/libsmb/clidfs.c |
| 75 |
index c477d7c6a46..99818a681e3 100644 |
| 76 |
--- a/source3/libsmb/clidfs.c |
| 77 |
+++ b/source3/libsmb/clidfs.c |
| 78 |
@@ -980,7 +980,7 @@ NTSTATUS cli_resolve_path(TALLOC_CTX *ctx, |
| 79 |
"IPC$", |
| 80 |
dfs_auth_info, |
| 81 |
false, |
| 82 |
- smb1cli_conn_encryption_on(rootcli->conn), |
| 83 |
+ cli_state_is_encryption_on(rootcli), |
| 84 |
smbXcli_conn_protocol(rootcli->conn), |
| 85 |
0, |
| 86 |
0x20, |
| 87 |
@@ -1038,7 +1038,7 @@ NTSTATUS cli_resolve_path(TALLOC_CTX *ctx, |
| 88 |
dfs_refs[count].share, |
| 89 |
dfs_auth_info, |
| 90 |
false, |
| 91 |
- smb1cli_conn_encryption_on(rootcli->conn), |
| 92 |
+ cli_state_is_encryption_on(rootcli), |
| 93 |
smbXcli_conn_protocol(rootcli->conn), |
| 94 |
0, |
| 95 |
0x20, |
| 96 |
diff --git a/source3/libsmb/libsmb_context.c b/source3/libsmb/libsmb_context.c |
| 97 |
index ed6ca2b1b9f..b55cf1e2d15 100644 |
| 98 |
--- a/source3/libsmb/libsmb_context.c |
| 99 |
+++ b/source3/libsmb/libsmb_context.c |
| 100 |
@@ -486,7 +486,7 @@ smbc_option_get(SMBCCTX *context, |
| 101 |
|
| 102 |
for (s = context->internal->servers; s; s = s->next) { |
| 103 |
num_servers++; |
| 104 |
- if (!smb1cli_conn_encryption_on(s->cli->conn)) { |
| 105 |
+ if (!cli_state_is_encryption_on(s->cli)) { |
| 106 |
return (void *)false; |
| 107 |
} |
| 108 |
} |
| 109 |
-- |
| 110 |
2.13.5 |
| 111 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph
