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authorJeremy Allison <jra@samba.org>2003-03-07 00:30:29 +0000
committerJeremy Allison <jra@samba.org>2003-03-07 00:30:29 +0000
commit3327f13795c10bac2f2c38b22826a54a40e1a945 (patch)
tree1e7a44068e4e8faf0f9b4833fe01a37d3f6cb426 /source3/smbd
parent735bcfacda659cc17ee6508f30f264b37afb4d17 (diff)
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Found at Connectathon, .NET RC1 arranges trans/trans2/nttrans parameters
differently to W2K, cope with this. Jeremy. (This used to be commit 172f415c9eaa4d310a52794e3dc1a6bc92206ce4)
Diffstat (limited to 'source3/smbd')
-rw-r--r--source3/smbd/ipc.c101
-rw-r--r--source3/smbd/nttrans.c102
-rw-r--r--source3/smbd/trans2.c93
3 files changed, 227 insertions, 69 deletions
diff --git a/source3/smbd/ipc.c b/source3/smbd/ipc.c
index 7fe02dbccf..08337c2901 100644
--- a/source3/smbd/ipc.c
+++ b/source3/smbd/ipc.c
@@ -360,52 +360,66 @@ int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int
uint16 *setup=NULL;
int outsize = 0;
uint16 vuid = SVAL(inbuf,smb_uid);
- int tpscnt = SVAL(inbuf,smb_vwv0);
- int tdscnt = SVAL(inbuf,smb_vwv1);
- int mprcnt = SVAL(inbuf,smb_vwv2);
- int mdrcnt = SVAL(inbuf,smb_vwv3);
- int msrcnt = CVAL(inbuf,smb_vwv4);
+ unsigned int tpscnt = SVAL(inbuf,smb_vwv0);
+ unsigned int tdscnt = SVAL(inbuf,smb_vwv1);
+ unsigned int mprcnt = SVAL(inbuf,smb_vwv2);
+ unsigned int mdrcnt = SVAL(inbuf,smb_vwv3);
+ unsigned int msrcnt = CVAL(inbuf,smb_vwv4);
BOOL close_on_completion = BITSETW(inbuf+smb_vwv5,0);
BOOL one_way = BITSETW(inbuf+smb_vwv5,1);
- int pscnt = SVAL(inbuf,smb_vwv9);
- int psoff = SVAL(inbuf,smb_vwv10);
- int dscnt = SVAL(inbuf,smb_vwv11);
- int dsoff = SVAL(inbuf,smb_vwv12);
- int suwcnt = CVAL(inbuf,smb_vwv13);
+ unsigned int pscnt = SVAL(inbuf,smb_vwv9);
+ unsigned int psoff = SVAL(inbuf,smb_vwv10);
+ unsigned int dscnt = SVAL(inbuf,smb_vwv11);
+ unsigned int dsoff = SVAL(inbuf,smb_vwv12);
+ unsigned int suwcnt = CVAL(inbuf,smb_vwv13);
START_PROFILE(SMBtrans);
memset(name, '\0',sizeof(name));
srvstr_pull_buf(inbuf, name, smb_buf(inbuf), sizeof(name), STR_TERMINATE);
- if (dscnt > tdscnt || pscnt > tpscnt) {
- exit_server("invalid trans parameters");
- }
+ if (dscnt > tdscnt || pscnt > tpscnt)
+ goto bad_param;
if (tdscnt) {
if((data = (char *)malloc(tdscnt)) == NULL) {
- DEBUG(0,("reply_trans: data malloc fail for %d bytes !\n", tdscnt));
+ DEBUG(0,("reply_trans: data malloc fail for %u bytes !\n", tdscnt));
END_PROFILE(SMBtrans);
return(ERROR_DOS(ERRDOS,ERRnomem));
}
+ if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
+ goto bad_param;
+ if (smb_base(inbuf)+dsoff+dscnt > inbuf + size)
+ goto bad_param;
+
memcpy(data,smb_base(inbuf)+dsoff,dscnt);
}
if (tpscnt) {
if((params = (char *)malloc(tpscnt)) == NULL) {
- DEBUG(0,("reply_trans: param malloc fail for %d bytes !\n", tpscnt));
+ DEBUG(0,("reply_trans: param malloc fail for %u bytes !\n", tpscnt));
END_PROFILE(SMBtrans);
return(ERROR_DOS(ERRDOS,ERRnomem));
}
+ if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
+ goto bad_param;
+ if (smb_base(inbuf)+psoff+pscnt > inbuf + size)
+ goto bad_param;
+
memcpy(params,smb_base(inbuf)+psoff,pscnt);
}
if (suwcnt) {
int i;
if((setup = (uint16 *)malloc(suwcnt*sizeof(uint16))) == NULL) {
- DEBUG(0,("reply_trans: setup malloc fail for %d bytes !\n", (int)(suwcnt * sizeof(uint16))));
- END_PROFILE(SMBtrans);
- return(ERROR_DOS(ERRDOS,ERRnomem));
- }
+ DEBUG(0,("reply_trans: setup malloc fail for %u bytes !\n", (unsigned int)(suwcnt * sizeof(uint16))));
+ END_PROFILE(SMBtrans);
+ return(ERROR_DOS(ERRDOS,ERRnomem));
+ }
+ if (inbuf+smb_vwv14+(suwcnt*SIZEOFWORD) > inbuf + size)
+ goto bad_param;
+ if ((smb_vwv14+(suwcnt*SIZEOFWORD) < smb_vwv14) || (smb_vwv14+(suwcnt*SIZEOFWORD) < (suwcnt*SIZEOFWORD)))
+ goto bad_param;
+
for (i=0;i<suwcnt;i++)
setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
}
@@ -423,7 +437,7 @@ int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int
/* receive the rest of the trans packet */
while (pscnt < tpscnt || dscnt < tdscnt) {
BOOL ret;
- int pcnt,poff,dcnt,doff,pdisp,ddisp;
+ unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
@@ -443,8 +457,11 @@ int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int
show_msg(inbuf);
- tpscnt = SVAL(inbuf,smb_vwv0);
- tdscnt = SVAL(inbuf,smb_vwv1);
+ /* Revise total_params and total_data in case they have changed downwards */
+ if (SVAL(inbuf,smb_vwv0) < tpscnt)
+ tpscnt = SVAL(inbuf,smb_vwv0);
+ if (SVAL(inbuf,smb_vwv1) < tdscnt)
+ tdscnt = SVAL(inbuf,smb_vwv1);
pcnt = SVAL(inbuf,smb_vwv2);
poff = SVAL(inbuf,smb_vwv3);
@@ -457,14 +474,34 @@ int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int
pscnt += pcnt;
dscnt += dcnt;
- if (dscnt > tdscnt || pscnt > tpscnt) {
- exit_server("invalid trans parameters");
- }
+ if (dscnt > tdscnt || pscnt > tpscnt)
+ goto bad_param;
- if (pcnt)
+ if (pcnt) {
+ if (pdisp+pcnt >= tpscnt)
+ goto bad_param;
+ if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
+ goto bad_param;
+ if (smb_base(inbuf) + poff + pcnt >= inbuf + bufsize)
+ goto bad_param;
+ if (params + pdisp < params)
+ goto bad_param;
+
memcpy(params+pdisp,smb_base(inbuf)+poff,pcnt);
- if (dcnt)
+ }
+
+ if (dcnt) {
+ if (ddisp+dcnt >= tdscnt)
+ goto bad_param;
+ if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
+ goto bad_param;
+ if (smb_base(inbuf) + doff + dcnt >= inbuf + bufsize)
+ goto bad_param;
+ if (data + ddisp < data)
+ goto bad_param;
+
memcpy(data+ddisp,smb_base(inbuf)+doff,dcnt);
+ }
}
@@ -517,4 +554,14 @@ int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int
END_PROFILE(SMBtrans);
return(outsize);
+
+
+ bad_param:
+
+ DEBUG(0,("reply_trans: invalid trans parameters\n"));
+ SAFE_FREE(data);
+ SAFE_FREE(params);
+ SAFE_FREE(setup);
+ END_PROFILE(SMBtrans);
+ return ERROR_DOS(ERRDOS,ERRinvalidparam);
}
diff --git a/source3/smbd/nttrans.c b/source3/smbd/nttrans.c
index bfac4e82e3..375c6c44f6 100644
--- a/source3/smbd/nttrans.c
+++ b/source3/smbd/nttrans.c
@@ -1771,8 +1771,7 @@ due to being in oplock break state.\n", (unsigned int)function_code ));
if(CVAL(inbuf, smb_wct) != 19 + (setup_count/2)) {
DEBUG(2,("Invalid smb_wct %d in nttrans call (should be %d)\n",
CVAL(inbuf, smb_wct), 19 + (setup_count/2)));
- END_PROFILE(SMBnttrans);
- return ERROR_DOS(ERRSRV,ERRerror);
+ goto bad_param;
}
/* Allocate the space for the setup, the maximum needed parameters and data */
@@ -1799,21 +1798,38 @@ due to being in oplock break state.\n", (unsigned int)function_code ));
num_data_sofar = data_count;
if (parameter_count > total_parameter_count || data_count > total_data_count)
- exit_server("reply_nttrans: invalid sizes in packet.");
+ goto bad_param;
if(setup) {
- memcpy( setup, &inbuf[smb_nt_SetupStart], setup_count);
DEBUG(10,("reply_nttrans: setup_count = %d\n", setup_count));
+ if ((smb_nt_SetupStart + setup_count < smb_nt_SetupStart) ||
+ (smb_nt_SetupStart + setup_count < setup_count))
+ goto bad_param;
+ if (smb_nt_SetupStart + setup_count > length)
+ goto bad_param;
+
+ memcpy( setup, &inbuf[smb_nt_SetupStart], setup_count);
dump_data(10, setup, setup_count);
}
if(params) {
- memcpy( params, smb_base(inbuf) + parameter_offset, parameter_count);
DEBUG(10,("reply_nttrans: parameter_count = %d\n", parameter_count));
+ if ((parameter_offset + parameter_count < parameter_offset) ||
+ (parameter_offset + parameter_count < parameter_count))
+ goto bad_param;
+ if (smb_base(inbuf) + parameter_offset + parameter_count > inbuf + length)
+ goto bad_param;
+
+ memcpy( params, smb_base(inbuf) + parameter_offset, parameter_count);
dump_data(10, params, parameter_count);
}
if(data) {
- memcpy( data, smb_base(inbuf) + data_offset, data_count);
DEBUG(10,("reply_nttrans: data_count = %d\n",data_count));
+ if ((data_offset + data_count < data_offset) || (data_offset + data_count < data_count))
+ goto bad_param;
+ if (smb_base(inbuf) + data_offset + data_count > inbuf + length)
+ goto bad_param;
+
+ memcpy( data, smb_base(inbuf) + data_offset, data_count);
dump_data(10, data, data_count);
}
@@ -1826,6 +1842,8 @@ due to being in oplock break state.\n", (unsigned int)function_code ));
while( num_data_sofar < total_data_count || num_params_sofar < total_parameter_count) {
BOOL ret;
+ uint32 parameter_displacement;
+ uint32 data_displacement;
ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
@@ -1837,25 +1855,57 @@ due to being in oplock break state.\n", (unsigned int)function_code ));
DEBUG(0,("reply_nttrans: %s in getting secondary nttrans response.\n",
(smb_read_error == READ_ERROR) ? "error" : "timeout" ));
}
- SAFE_FREE(params);
- SAFE_FREE(data);
- SAFE_FREE(setup);
- END_PROFILE(SMBnttrans);
- return ERROR_DOS(ERRSRV,ERRerror);
+ goto bad_param;
}
/* Revise total_params and total_data in case they have changed downwards */
- total_parameter_count = IVAL(inbuf, smb_nts_TotalParameterCount);
- total_data_count = IVAL(inbuf, smb_nts_TotalDataCount);
- num_params_sofar += (parameter_count = IVAL(inbuf,smb_nts_ParameterCount));
- num_data_sofar += ( data_count = IVAL(inbuf, smb_nts_DataCount));
- if (num_params_sofar > total_parameter_count || num_data_sofar > total_data_count)
- exit_server("reply_nttrans2: data overflow in secondary nttrans packet");
-
- memcpy( &params[ IVAL(inbuf, smb_nts_ParameterDisplacement)],
- smb_base(inbuf) + IVAL(inbuf, smb_nts_ParameterOffset), parameter_count);
- memcpy( &data[IVAL(inbuf, smb_nts_DataDisplacement)],
- smb_base(inbuf)+ IVAL(inbuf, smb_nts_DataOffset), data_count);
+ if (IVAL(inbuf, smb_nts_TotalParameterCount) < total_parameter_count)
+ total_parameter_count = IVAL(inbuf, smb_nts_TotalParameterCount);
+ if (IVAL(inbuf, smb_nts_TotalDataCount) < total_data_count)
+ total_data_count = IVAL(inbuf, smb_nts_TotalDataCount);
+
+ parameter_count = IVAL(inbuf,smb_nts_ParameterCount);
+ parameter_offset = IVAL(inbuf, smb_nts_ParameterOffset);
+ parameter_displacement = IVAL(inbuf, smb_nts_ParameterDisplacement);
+ num_params_sofar += parameter_count;
+
+ data_count = IVAL(inbuf, smb_nts_DataCount);
+ data_displacement = IVAL(inbuf, smb_nts_DataDisplacement);
+ data_offset = IVAL(inbuf, smb_nts_DataDisplacement);
+ num_data_sofar += data_count;
+
+ if (num_params_sofar > total_parameter_count || num_data_sofar > total_data_count) {
+ DEBUG(0,("reply_nttrans2: data overflow in secondary nttrans packet"));
+ goto bad_param;
+ }
+
+ if (parameter_count) {
+ if (parameter_displacement + parameter_count >= total_parameter_count)
+ goto bad_param;
+ if ((parameter_displacement + parameter_count < parameter_displacement) ||
+ (parameter_displacement + parameter_count < parameter_count))
+ goto bad_param;
+ if (smb_base(inbuf) + parameter_offset + parameter_count >= inbuf + bufsize)
+ goto bad_param;
+ if (parameter_displacement + params < params)
+ goto bad_param;
+
+ memcpy( &params[parameter_displacement], smb_base(inbuf) + parameter_offset, parameter_count);
+ }
+
+ if (data_count) {
+ if (data_displacement + data_count >= total_data_count)
+ goto bad_param;
+ if ((data_displacement + data_count < data_displacement) ||
+ (data_displacement + data_count < data_count))
+ goto bad_param;
+ if (smb_base(inbuf) + data_offset + data_count >= inbuf + bufsize)
+ goto bad_param;
+ if (data_displacement + data < data)
+ goto bad_param;
+
+ memcpy( &data[data_displacement], smb_base(inbuf)+ data_offset, data_count);
+ }
}
}
@@ -1933,4 +1983,12 @@ due to being in oplock break state.\n", (unsigned int)function_code ));
return outsize; /* If a correct response was needed the call_nt_transact_xxxx
calls have already sent it. If outsize != -1 then it is
returning an error packet. */
+
+ bad_param:
+
+ SAFE_FREE(params);
+ SAFE_FREE(data);
+ SAFE_FREE(setup);
+ END_PROFILE(SMBnttrans);
+ return ERROR_DOS(ERRDOS,ERRinvalidparam);
}
diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c
index 155c996314..d57a29ff77 100644
--- a/source3/smbd/trans2.c
+++ b/source3/smbd/trans2.c
@@ -3094,7 +3094,7 @@ int reply_trans2(connection_struct *conn,
unsigned int suwcnt = SVAL(inbuf, smb_suwcnt);
unsigned int tran_call = SVAL(inbuf, smb_setup0);
char *params = NULL, *data = NULL;
- int num_params, num_params_sofar, num_data, num_data_sofar;
+ unsigned int num_params, num_params_sofar, num_data, num_data_sofar;
START_PROFILE(SMBtrans2);
if(global_oplock_break && (tran_call == TRANSACT2_OPEN)) {
@@ -3133,10 +3133,10 @@ int reply_trans2(connection_struct *conn,
(SVAL(inbuf,(smb_setup+6)) == LMFUNC_GETJOBID)) {
DEBUG(2,("Got Trans2 DevIOctl jobid\n"));
} else {
- DEBUG(2,("Invalid smb_sucnt in trans2 call(%d)\n",suwcnt));
+ DEBUG(2,("Invalid smb_sucnt in trans2 call(%u)\n",suwcnt));
DEBUG(2,("Transaction is %d\n",tran_call));
END_PROFILE(SMBtrans2);
- return ERROR_DOS(ERRSRV,ERRerror);
+ ERROR_DOS(ERRDOS,ERRinvalidparam);
}
}
@@ -3162,10 +3162,22 @@ int reply_trans2(connection_struct *conn,
if (num_params > total_params || num_data > total_data)
exit_server("invalid params in reply_trans2");
- if(params)
- memcpy( params, smb_base(inbuf) + SVAL(inbuf, smb_psoff), num_params);
- if(data)
- memcpy( data, smb_base(inbuf) + SVAL(inbuf, smb_dsoff), num_data);
+ if(params) {
+ unsigned int psoff = SVAL(inbuf, smb_psoff);
+ if ((psoff + num_params < psoff) || (psoff + num_params < num_params))
+ goto bad_param;
+ if (smb_base(inbuf) + psoff + num_params > inbuf + length)
+ goto bad_param;
+ memcpy( params, smb_base(inbuf) + psoff, num_params);
+ }
+ if(data) {
+ unsigned int dsoff = SVAL(inbuf, smb_dsoff);
+ if ((dsoff + num_data < dsoff) || (dsoff + num_data < num_data))
+ goto bad_param;
+ if (smb_base(inbuf) + dsoff + num_data > inbuf + length)
+ goto bad_param;
+ memcpy( data, smb_base(inbuf) + dsoff, num_data);
+ }
if(num_data_sofar < total_data || num_params_sofar < total_params) {
/* We need to send an interim response then receive the rest
@@ -3177,6 +3189,10 @@ int reply_trans2(connection_struct *conn,
while (num_data_sofar < total_data ||
num_params_sofar < total_params) {
BOOL ret;
+ unsigned int param_disp;
+ unsigned int param_off;
+ unsigned int data_disp;
+ unsigned int data_off;
ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
@@ -3188,25 +3204,55 @@ int reply_trans2(connection_struct *conn,
else
DEBUG(0,("reply_trans2: %s in getting secondary trans2 response.\n",
(smb_read_error == READ_ERROR) ? "error" : "timeout" ));
- SAFE_FREE(params);
- SAFE_FREE(data);
- END_PROFILE(SMBtrans2);
- return ERROR_DOS(ERRSRV,ERRerror);
+ goto bad_param;
}
/* Revise total_params and total_data in case
they have changed downwards */
- total_params = SVAL(inbuf, smb_tpscnt);
- total_data = SVAL(inbuf, smb_tdscnt);
- num_params_sofar += (num_params = SVAL(inbuf,smb_spscnt));
- num_data_sofar += ( num_data = SVAL(inbuf, smb_sdscnt));
+ if (SVAL(inbuf, smb_tpscnt) < total_params)
+ total_params = SVAL(inbuf, smb_tpscnt);
+ if (SVAL(inbuf, smb_tdscnt) < total_data)
+ total_data = SVAL(inbuf, smb_tdscnt);
+
+ num_params = SVAL(inbuf,smb_spscnt);
+ param_off = SVAL(inbuf, smb_spsoff);
+ param_disp = SVAL(inbuf, smb_spsdisp);
+ num_params_sofar += num_params;
+
+ num_data = SVAL(inbuf, smb_sdscnt);
+ data_off = SVAL(inbuf, smb_sdsoff);
+ data_disp = SVAL(inbuf, smb_sdsdisp);
+ num_data_sofar += num_data;
+
if (num_params_sofar > total_params || num_data_sofar > total_data)
- exit_server("data overflow in trans2");
+ goto bad_param;
- memcpy( &params[ SVAL(inbuf, smb_spsdisp)],
- smb_base(inbuf) + SVAL(inbuf, smb_spsoff), num_params);
- memcpy( &data[SVAL(inbuf, smb_sdsdisp)],
- smb_base(inbuf)+ SVAL(inbuf, smb_sdsoff), num_data);
+ if (num_params) {
+ if (param_disp + num_params >= total_params)
+ goto bad_param;
+ if ((param_disp + num_params < param_disp) ||
+ (param_disp + num_params < num_params))
+ goto bad_param;
+ if (smb_base(inbuf) + param_off + num_params >= inbuf + bufsize)
+ goto bad_param;
+ if (params + param_disp < params)
+ goto bad_param;
+
+ memcpy( &params[param_disp], smb_base(inbuf) + param_off, num_params);
+ }
+ if (num_data) {
+ if (data_disp + num_data >= total_data)
+ goto bad_param;
+ if ((data_disp + num_data < data_disp) ||
+ (data_disp + num_data < num_data))
+ goto bad_param;
+ if (smb_base(inbuf) + data_off + num_data >= inbuf + bufsize)
+ goto bad_param;
+ if (data + data_disp < data)
+ goto bad_param;
+
+ memcpy( &data[data_disp], smb_base(inbuf) + data_off, num_data);
+ }
}
}
@@ -3320,4 +3366,11 @@ int reply_trans2(connection_struct *conn,
return outsize; /* If a correct response was needed the
call_trans2xxx calls have already sent
it. If outsize != -1 then it is returning */
+
+ bad_param:
+
+ SAFE_FREE(params);
+ SAFE_FREE(data);
+ END_PROFILE(SMBtrans2);
+ return ERROR_DOS(ERRDOS,ERRinvalidparam);
}