path: root/package/samba/samba-01CVE-2011-2522.patch

From b610e0cee563465c6b970647b215f8ae4d0c6599 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 12:56:21 +0200
Subject: [PATCH 01/12] s3 swat: Allow getting the user's HTTP auth password

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/cgi.c        |    9 +++++++++
 source/web/swat_proto.h |    1 +
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/source/web/cgi.c b/source/web/cgi.c
index 72aa11c..ccdc3a7 100644
--- a/source/web/cgi.c
+++ b/source/web/cgi.c
@@ -42,6 +42,7 @@ static char *query_string;
 static const char *baseurl;
 static char *pathinfo;
 static char *C_user;
+static char *C_pass;
 static bool inetd_server;
 static bool got_request;
 
@@ -388,6 +389,7 @@ static bool cgi_handle_authorization(char *line)
 			
 			/* Save the users name */
 			C_user = SMB_STRDUP(user);
+			C_pass = SMB_STRDUP(user_pass);
 			TALLOC_FREE(pass);
 			return True;
 		}
@@ -422,6 +424,13 @@ char *cgi_user_name(void)
         return(C_user);
 }
 
+/***************************************************************************
+return a ptr to the users password
+  ***************************************************************************/
+char *cgi_user_pass(void)
+{
+        return(C_pass);
+}
 
 /***************************************************************************
 handle a file download
diff --git a/source/web/swat_proto.h b/source/web/swat_proto.h
index 0f84e4f..76f9c3c 100644
--- a/source/web/swat_proto.h
+++ b/source/web/swat_proto.h
@@ -31,6 +31,7 @@ const char *cgi_variable(const char *name);
 const char *cgi_variable_nonull(const char *name);
 bool am_root(void);
 char *cgi_user_name(void);
+char *cgi_user_pass(void);
 void cgi_setup(const char *rootdir, int auth_required);
 const char *cgi_baseurl(void);
 const char *cgi_pathinfo(void);
-- 
1.7.1


From 3806fec53dcf3b6e5c3fd71917f9d67d47c65e32 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 12:57:43 +0200
Subject: [PATCH 02/12] s3 swat: Add support for anti-XSRF token

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c       |   54 +++++++++++++++++++++++++++++++++++++++++++++++
 source/web/swat_proto.h |    5 ++++
 2 files changed, 59 insertions(+), 0 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 434b1ac..e7d84e5 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -29,6 +29,7 @@
 
 #include "includes.h"
 #include "web/swat_proto.h"
+#include "../lib/crypto/md5.h"
 
 static int demo_mode = False;
 static int passwd_only = False;
@@ -50,6 +51,7 @@ static int iNumNonAutoPrintServices = 0;
 #define DISABLE_USER_FLAG "disable_user_flag"
 #define ENABLE_USER_FLAG "enable_user_flag"
 #define RHOST "remote_host"
+#define XSRF_TOKEN "xsrf"
 
 #define _(x) lang_msg_rotate(talloc_tos(),x)
 
@@ -138,6 +140,58 @@ static char *make_parm_name(const char *label)
 	return parmname;
 }
 
+void get_xsrf_token(const char *username, const char *pass,
+		    const char *formname, char token_str[33])
+{
+	struct MD5Context md5_ctx;
+	uint8_t token[16];
+	int i;
+
+	token_str[0] = '\0';
+	ZERO_STRUCT(md5_ctx);
+	MD5Init(&md5_ctx);
+
+	MD5Update(&md5_ctx, (uint8_t *)formname, strlen(formname));
+	if (username != NULL) {
+		MD5Update(&md5_ctx, (uint8_t *)username, strlen(username));
+	}
+	if (pass != NULL) {
+		MD5Update(&md5_ctx, (uint8_t *)pass, strlen(pass));
+	}
+
+	MD5Final(token, &md5_ctx);
+
+	for(i = 0; i < sizeof(token); i++) {
+		char tmp[3];
+
+		snprintf(tmp, sizeof(tmp), "%02x", token[i]);
+		strncat(token_str, tmp, sizeof(tmp));
+	}
+}
+
+void print_xsrf_token(const char *username, const char *pass,
+		      const char *formname)
+{
+	char token[33];
+
+	get_xsrf_token(username, pass, formname, token);
+	printf("<input type=\"hidden\" name=\"%s\" value=\"%s\">\n",
+	       XSRF_TOKEN, token);
+
+}
+
+bool verify_xsrf_token(const char *formname)
+{
+	char expected[33];
+	const char *username = cgi_user_name();
+	const char *pass = cgi_user_pass();
+	const char *token = cgi_variable_nonull(XSRF_TOKEN);
+
+	get_xsrf_token(username, pass, formname, expected);
+	return (strncmp(expected, token, sizeof(expected)) == 0);
+}
+
+
 /****************************************************************************
   include a lump of html in a page 
 ****************************************************************************/
diff --git a/source/web/swat_proto.h b/source/web/swat_proto.h
index 76f9c3c..e66c942 100644
--- a/source/web/swat_proto.h
+++ b/source/web/swat_proto.h
@@ -67,5 +67,10 @@ void status_page(void);
 /* The following definitions come from web/swat.c  */
 
 const char *lang_msg_rotate(TALLOC_CTX *ctx, const char *msgid);
+void get_xsrf_token(const char *username, const char *pass,
+		    const char *formname, char token_str[33]);
+void print_xsrf_token(const char *username, const char *pass,
+		      const char *formname);
+bool verify_xsrf_token(const char *formname);
 
 #endif /*  _SWAT_PROTO_H_  */
-- 
1.7.1


From 3f38cf42facc38c19e0448cbae3078b9606b08e4 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 12:58:53 +0200
Subject: [PATCH 03/12] s3 swat: Add XSRF protection to status page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/statuspage.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/source/web/statuspage.c b/source/web/statuspage.c
index 8070ae7..fe545e4 100644
--- a/source/web/statuspage.c
+++ b/source/web/statuspage.c
@@ -247,9 +247,14 @@ void status_page(void)
 	int nr_running=0;
 	bool waitup = False;
 	TALLOC_CTX *ctx = talloc_stackframe();
+	const char form_name[] = "status";
 
 	smbd_pid = pid_to_procid(pidfile_pid("smbd"));
 
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
+
 	if (cgi_variable("smbd_restart") || cgi_variable("all_restart")) {
 		stop_smbd();
 		start_smbd();
@@ -326,9 +331,11 @@ void status_page(void)
 
 	initPid2Machine ();
 
+output_page:
 	printf("<H2>%s</H2>\n", _("Server Status"));
 
 	printf("<FORM method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
 
 	if (!autorefresh) {
 		printf("<input type=submit value=\"%s\" name=\"autorefresh\">\n", _("Auto Refresh"));
-- 
1.7.1


From ba996f0ae87f6bf4f19a4918e44dbd6d44a96561 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:02:53 +0200
Subject: [PATCH 04/12] s3 swat: Add XSRF protection to viewconfig page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index e7d84e5..647126f 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -664,13 +664,20 @@ static void welcome_page(void)
 static void viewconfig_page(void)
 {
 	int full_view=0;
+	const char form_name[] = "viewconfig";
+
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
 
 	if (cgi_variable("full_view")) {
 		full_view = 1;
 	}
 
+output_page:
 	printf("<H2>%s</H2>\n", _("Current Config"));
 	printf("<form method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
 
 	if (full_view) {
 		printf("<input type=submit name=\"normal_view\" value=\"%s\">\n", _("Normal View"));
-- 
1.7.1


From 94f8482607a175c44436fae456fbda3624629982 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:03:15 +0200
Subject: [PATCH 05/12] s3 swat: Add XSRF protection to wizard_params page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 647126f..b7eec4a 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -697,18 +697,25 @@ output_page:
 static void wizard_params_page(void)
 {
 	unsigned int parm_filter = FLAG_WIZARD;
+	const char form_name[] = "wizard_params";
 
 	/* Here we first set and commit all the parameters that were selected
  	   in the previous screen. */
 
 	printf("<H2>%s</H2>\n", _("Wizard Parameter Edit Page"));
 
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
+
 	if (cgi_variable("Commit")) {
 		commit_parameters(GLOBAL_SECTION_SNUM);
 		save_reload(0);
 	}
 
+output_page:
 	printf("<form name=\"swatform\" method=post action=wizard_params>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
 
 	if (have_write_access) {
 		printf("<input type=submit name=\"Commit\" value=\"Commit Changes\">\n");
-- 
1.7.1


From eb22fd73060534700d514ec295985549131c7569 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:03:44 +0200
Subject: [PATCH 06/12] s3 swat: Add XSRF protection to wizard page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index b7eec4a..b6e0c0f 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -751,6 +751,11 @@ static void wizard_page(void)
 	int have_home = -1;
 	int HomeExpo = 0;
 	int SerType = 0;
+	const char form_name[] = "wizard";
+
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
 
 	if (cgi_variable("Rewrite")) {
 		(void) rewritecfg_file();
@@ -841,10 +846,12 @@ static void wizard_page(void)
 		winstype = 3;
 
 	role = lp_server_role();
-	
+
+output_page:
 	/* Here we go ... */
 	printf("<H2>%s</H2>\n", _("Samba Configuration Wizard"));
 	printf("<form method=post action=wizard>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
 
 	if (have_write_access) {
 		printf("%s\n", _("The \"Rewrite smb.conf file\" button will clear the smb.conf file of all default values and of comments."));
-- 
1.7.1


From 8fb3064eeaa3640af6c8b91aa5859d8bfb6d0888 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:04:12 +0200
Subject: [PATCH 07/12] s3 swat: Add XSRF protection to globals page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index b6e0c0f..5d11685 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -920,9 +920,14 @@ static void globals_page(void)
 {
 	unsigned int parm_filter = FLAG_BASIC;
 	int mode = 0;
+	const char form_name[] = "globals";
 
 	printf("<H2>%s</H2>\n", _("Global Parameters"));
 
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
+
 	if (cgi_variable("Commit")) {
 		commit_parameters(GLOBAL_SECTION_SNUM);
 		save_reload(0);
@@ -935,7 +940,9 @@ static void globals_page(void)
 	if ( cgi_variable("AdvMode"))
 		mode = 1;
 
+output_page:
 	printf("<form name=\"swatform\" method=post action=globals>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
 
 	ViewModeBoxes( mode );
 	switch ( mode ) {
-- 
1.7.1


From ef457a20422cfa8231e25b539d2cd87f299686b9 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:04:48 +0200
Subject: [PATCH 08/12] s3 swat: Add XSRF protection to shares page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |   18 +++++++++++++-----
 1 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 5d11685..4544c31 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -982,11 +982,17 @@ static void shares_page(void)
 	int mode = 0;
 	unsigned int parm_filter = FLAG_BASIC;
 	size_t converted_size;
+	const char form_name[] = "shares";
+
+	printf("<H2>%s</H2>\n", _("Share Parameters"));
+
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
 
 	if (share)
 		snum = lp_servicenumber(share);
 
-	printf("<H2>%s</H2>\n", _("Share Parameters"));
 
 	if (cgi_variable("Commit") && snum >= 0) {
 		commit_parameters(snum);
@@ -1012,10 +1018,6 @@ static void shares_page(void)
 		}
 	}
 
-	printf("<FORM name=\"swatform\" method=post>\n");
-
-	printf("<table>\n");
-
 	if ( cgi_variable("ViewMode") )
 		mode = atoi(cgi_variable_nonull("ViewMode"));
 	if ( cgi_variable("BasicMode"))
@@ -1023,6 +1025,12 @@ static void shares_page(void)
 	if ( cgi_variable("AdvMode"))
 		mode = 1;
 
+output_page:
+	printf("<FORM name=\"swatform\" method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
+
+	printf("<table>\n");
+
 	ViewModeBoxes( mode );
 	switch ( mode ) {
 		case 0:
-- 
1.7.1


From 4850456845d2da5e3451716a5ad4ca0ef034e01f Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:05:38 +0200
Subject: [PATCH 09/12] s3 swat: Add XSRF protection to password page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 4544c31..5242484 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -1225,12 +1225,15 @@ static void chg_passwd(void)
 static void passwd_page(void)
 {
 	const char *new_name = cgi_user_name();
+	const char passwd_form[] = "passwd";
+	const char rpasswd_form[] = "rpasswd";
 
 	if (!new_name) new_name = "";
 
 	printf("<H2>%s</H2>\n", _("Server Password Management"));
 
 	printf("<FORM name=\"swatform\" method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), passwd_form);
 
 	printf("<table>\n");
 
@@ -1270,14 +1273,16 @@ static void passwd_page(void)
 	 * Do some work if change, add, disable or enable was
 	 * requested. It could be this is the first time through this
 	 * code, so there isn't anything to do.  */
-	if ((cgi_variable(CHG_S_PASSWD_FLAG)) || (cgi_variable(ADD_USER_FLAG)) || (cgi_variable(DELETE_USER_FLAG)) ||
-	    (cgi_variable(DISABLE_USER_FLAG)) || (cgi_variable(ENABLE_USER_FLAG))) {
+	if (verify_xsrf_token(passwd_form) &&
+	   ((cgi_variable(CHG_S_PASSWD_FLAG)) || (cgi_variable(ADD_USER_FLAG)) || (cgi_variable(DELETE_USER_FLAG)) ||
+	    (cgi_variable(DISABLE_USER_FLAG)) || (cgi_variable(ENABLE_USER_FLAG)))) {
 		chg_passwd();		
 	}
 
 	printf("<H2>%s</H2>\n", _("Client/Server Password Management"));
 
 	printf("<FORM name=\"swatform\" method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), rpasswd_form);
 
 	printf("<table>\n");
 
@@ -1310,7 +1315,7 @@ static void passwd_page(void)
 	 * password somewhere other than the server. It could be this
 	 * is the first time through this code, so there isn't
 	 * anything to do.  */
-	if (cgi_variable(CHG_R_PASSWD_FLAG)) {
+	if (verify_xsrf_token(passwd_form) && cgi_variable(CHG_R_PASSWD_FLAG)) {
 		chg_passwd();		
 	}
 
-- 
1.7.1


From 407ae61fbfc8ee1643a4db8ea9b104f031b32e0f Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Fri, 8 Jul 2011 15:06:13 +0200
Subject: [PATCH 10/12] s3 swat: Add XSRF protection to printer page

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c |   28 ++++++++++++++++++----------
 1 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 5242484..4582a63 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -1332,18 +1332,15 @@ static void printers_page(void)
 	int i;
 	int mode = 0;
 	unsigned int parm_filter = FLAG_BASIC;
+	const char form_name[] = "printers";
+
+	if (!verify_xsrf_token(form_name)) {
+		goto output_page;
+	}
 
 	if (share)
 		snum = lp_servicenumber(share);
 
-        printf("<H2>%s</H2>\n", _("Printer Parameters"));
- 
-        printf("<H3>%s</H3>\n", _("Important Note:"));
-        printf("%s",_("Printer names marked with [*] in the Choose Printer drop-down box "));
-        printf("%s",_("are autoloaded printers from "));
-        printf("<A HREF=\"/swat/help/smb.conf.5.html#printcapname\" target=\"docs\">%s</A>\n", _("Printcap Name"));
-        printf("%s\n", _("Attempting to delete these printers from SWAT will have no effect."));
-
 	if (cgi_variable("Commit") && snum >= 0) {
 		commit_parameters(snum);
 		if (snum >= iNumNonAutoPrintServices)
@@ -1372,8 +1369,6 @@ static void printers_page(void)
 		}
 	}
 
-	printf("<FORM name=\"swatform\" method=post>\n");
-
 	if ( cgi_variable("ViewMode") )
 		mode = atoi(cgi_variable_nonull("ViewMode"));
         if ( cgi_variable("BasicMode"))
@@ -1381,6 +1376,19 @@ static void printers_page(void)
         if ( cgi_variable("AdvMode"))
                 mode = 1;
 
+output_page:
+        printf("<H2>%s</H2>\n", _("Printer Parameters"));
+
+        printf("<H3>%s</H3>\n", _("Important Note:"));
+        printf("%s",_("Printer names marked with [*] in the Choose Printer drop-down box "));
+        printf("%s",_("are autoloaded printers from "));
+        printf("<A HREF=\"/swat/help/smb.conf.5.html#printcapname\" target=\"docs\">%s</A>\n", _("Printcap Name"));
+        printf("%s\n", _("Attempting to delete these printers from SWAT will have no effect."));
+
+
+	printf("<FORM name=\"swatform\" method=post>\n");
+	print_xsrf_token(cgi_user_name(), cgi_user_pass(), form_name);
+
 	ViewModeBoxes( mode );
 	switch ( mode ) {
 		case 0:
-- 
1.7.1


From 11e281228f334bf3d384df5655136f0b4b4068aa Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Sat, 9 Jul 2011 09:52:07 +0200
Subject: [PATCH 11/12] s3 swat: Add time component to XSRF token

Signed-off-by: Kai Blin <kai@samba.org>
---
 source/web/swat.c       |   28 ++++++++++++++++++++++++----
 source/web/swat_proto.h |    2 +-
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/source/web/swat.c b/source/web/swat.c
index 4582a63..50df66e 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -52,6 +52,8 @@ static int iNumNonAutoPrintServices = 0;
 #define ENABLE_USER_FLAG "enable_user_flag"
 #define RHOST "remote_host"
 #define XSRF_TOKEN "xsrf"
+#define XSRF_TIME "xsrf_time"
+#define XSRF_TIMEOUT 300
 
 #define _(x) lang_msg_rotate(talloc_tos(),x)
 
@@ -141,7 +143,7 @@ static char *make_parm_name(const char *label)
 }
 
 void get_xsrf_token(const char *username, const char *pass,
-		    const char *formname, char token_str[33])
+		    const char *formname, time_t xsrf_time, char token_str[33])
 {
 	struct MD5Context md5_ctx;
 	uint8_t token[16];
@@ -152,6 +154,7 @@ void get_xsrf_token(const char *username, const char *pass,
 	MD5Init(&md5_ctx);
 
 	MD5Update(&md5_ctx, (uint8_t *)formname, strlen(formname));
+	MD5Update(&md5_ctx, (uint8_t *)&xsrf_time, sizeof(time_t));
 	if (username != NULL) {
 		MD5Update(&md5_ctx, (uint8_t *)username, strlen(username));
 	}
@@ -173,11 +176,13 @@ void print_xsrf_token(const char *username, const char *pass,
 		      const char *formname)
 {
 	char token[33];
+	time_t xsrf_time = time(NULL);
 
-	get_xsrf_token(username, pass, formname, token);
+	get_xsrf_token(username, pass, formname, xsrf_time, token);
 	printf("<input type=\"hidden\" name=\"%s\" value=\"%s\">\n",
 	       XSRF_TOKEN, token);
-
+	printf("<input type=\"hidden\" name=\"%s\" value=\"%lld\">\n",
+	       XSRF_TIME, (long long int)xsrf_time);
 }
 
 bool verify_xsrf_token(const char *formname)
@@ -186,8 +191,23 @@ bool verify_xsrf_token(const char *formname)
 	const char *username = cgi_user_name();
 	const char *pass = cgi_user_pass();
 	const char *token = cgi_variable_nonull(XSRF_TOKEN);
+	const char *time_str = cgi_variable_nonull(XSRF_TIME);
+	time_t xsrf_time = 0;
+	time_t now = time(NULL);
+
+	if (sizeof(time_t) == sizeof(int)) {
+		xsrf_time = atoi(time_str);
+	} else if (sizeof(time_t) == sizeof(long)) {
+		xsrf_time = atol(time_str);
+	} else if (sizeof(time_t) == sizeof(long long)) {
+		xsrf_time = atoll(time_str);
+	}
+
+	if (abs(now - xsrf_time) > XSRF_TIMEOUT) {
+		return false;
+	}
 
-	get_xsrf_token(username, pass, formname, expected);
+	get_xsrf_token(username, pass, formname, xsrf_time, expected);
 	return (strncmp(expected, token, sizeof(expected)) == 0);
 }
 
diff --git a/source/web/swat_proto.h b/source/web/swat_proto.h
index e66c942..424a3af 100644
--- a/source/web/swat_proto.h
+++ b/source/web/swat_proto.h
@@ -68,7 +68,7 @@ void status_page(void);
 
 const char *lang_msg_rotate(TALLOC_CTX *ctx, const char *msgid);
 void get_xsrf_token(const char *username, const char *pass,
-		    const char *formname, char token_str[33]);
+		    const char *formname, time_t xsrf_time, char token_str[33]);
 void print_xsrf_token(const char *username, const char *pass,
 		      const char *formname);
 bool verify_xsrf_token(const char *formname);
-- 
1.7.1


From 3973cfa50024983618a44ffdb9f756b642b85be7 Mon Sep 17 00:00:00 2001
From: Kai Blin <kai@samba.org>
Date: Tue, 12 Jul 2011 08:08:24 +0200
Subject: [PATCH 12/12] s3 swat: Create random nonce in CGI mode

In CGI mode, we don't get access to the user's password, which would
reduce the hash used so far to parameters an attacker can easily guess.
To work around this, read the nonce from secrets.tdb or generate one if
it's not there.
Also populate the C_user field so we can use that for token creation.

Signed-off-by: Kai Blin <kai@samba.org>

The last 12 patches address bug #8290 (CSRF vulnerability in SWAT).
This addresses CVE-2011-2522 (Cross-Site Request Forgery in SWAT).
---
 source/web/cgi.c  |   18 +++++++++++++++++-
 source/web/swat.c |    1 -
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/source/web/cgi.c b/source/web/cgi.c
index ccdc3a7..890ac8e 100644
--- a/source/web/cgi.c
+++ b/source/web/cgi.c
@@ -19,6 +19,7 @@
 
 #include "includes.h"
 #include "web/swat_proto.h"
+#include "secrets.h"
 
 #define MAX_VARIABLES 10000
 
@@ -321,7 +322,22 @@ static void cgi_web_auth(void)
 		exit(0);
 	}
 
-	setuid(0);
+	C_user = SMB_STRDUP(user);
+
+	if (!setuid(0)) {
+		C_pass = secrets_fetch_generic("root", "SWAT");
+		if (C_pass == NULL) {
+			char *tmp_pass = NULL;
+			tmp_pass = generate_random_str(16);
+			if (tmp_pass == NULL) {
+				printf("%sFailed to create random nonce for "
+				       "SWAT session\n<br>%s\n", head, tail);
+				exit(0);
+			}
+			secrets_store_generic("root", "SWAT", tmp_pass);
+			C_pass = SMB_STRDUP(tmp_pass);
+		}
+	}
 	setuid(pwd->pw_uid);
 	if (geteuid() != pwd->pw_uid || getuid() != pwd->pw_uid) {
 		printf("%sFailed to become user %s - uid=%d/%d<br>%s\n", 
diff --git a/source/web/swat.c b/source/web/swat.c
index 50df66e..146f1cf 100644
--- a/source/web/swat.c
+++ b/source/web/swat.c
@@ -29,7 +29,6 @@
 
 #include "includes.h"
 #include "web/swat_proto.h"
-#include "../lib/crypto/md5.h"
 
 static int demo_mode = False;
 static int passwd_only = False;
-- 
1.7.1