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-rw-r--r--source3/nmbd/nmbd_processlogon.c99
1 files changed, 82 insertions, 17 deletions
diff --git a/source3/nmbd/nmbd_processlogon.c b/source3/nmbd/nmbd_processlogon.c
index e837939fa3..1ba45ce8df 100644
--- a/source3/nmbd/nmbd_processlogon.c
+++ b/source3/nmbd/nmbd_processlogon.c
@@ -68,7 +68,7 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
DEBUG(4,("process_logon_packet: Logon from %s: code = 0x%x\n", inet_ntoa(p->ip), code));
switch (code) {
- case 0:
+ case 0:
{
fstring mach_str, user_str, getdc_str;
char *q = buf + 2;
@@ -108,7 +108,9 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
fstrcpy(reply_name, "\\\\");
fstrcat(reply_name, my_name);
- push_ascii_fstring(q, reply_name);
+ push_ascii(q,reply_name,
+ sizeof(outbuf)-PTR_DIFF(q, outbuf),
+ STR_TERMINATE);
q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
SSVAL(q, 0, token);
@@ -116,7 +118,7 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
dump_data(4, (uint8 *)outbuf, PTR_DIFF(q, outbuf));
- send_mailslot(True, getdc_str,
+ send_mailslot(True, getdc_str,
outbuf,PTR_DIFF(q,outbuf),
global_myname(), 0x0,
mach_str,
@@ -132,7 +134,7 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
char *q = buf + 2;
char *machine = q;
- if (!lp_domain_master()) {
+ if (!lp_domain_master()) {
/* We're not Primary Domain Controller -- ignore this */
return;
}
@@ -204,7 +206,9 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
q += 2;
fstrcpy(reply_name,my_name);
- push_ascii_fstring(q, reply_name);
+ push_ascii(q, reply_name,
+ sizeof(outbuf)-PTR_DIFF(q, outbuf),
+ STR_TERMINATE);
q = skip_string(outbuf,sizeof(outbuf),q); /* PDC name */
/* PDC and domain name */
@@ -212,8 +216,15 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
/* Make a full reply */
q = ALIGN2(q, outbuf);
- q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
- q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True); /* Domain name*/
+ q += dos_PutUniCode(q, my_name,
+ sizeof(pstring) - PTR_DIFF(q, outbuf),
+ True); /* PDC name */
+ q += dos_PutUniCode(q, lp_workgroup(),
+ sizeof(pstring) - (q-outbuf),
+ True); /* Domain name*/
+ if (sizeof(pstring) - PTR_DIFF(q, outbuf) < 8) {
+ return;
+ }
SIVAL(q, 0, 1); /* our nt version */
SSVAL(q, 4, 0xffff); /* our lmnttoken */
SSVAL(q, 6, 0xffff); /* our lm20token */
@@ -349,9 +360,15 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
q += 2;
- q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
- q += dos_PutUniCode(q, ascuser, sizeof(pstring), True);
- q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
+ q += dos_PutUniCode(q, reply_name,
+ sizeof(pstring) - PTR_DIFF(q, outbuf),
+ True);
+ q += dos_PutUniCode(q, ascuser,
+ sizeof(pstring) - PTR_DIFF(q, outbuf),
+ True);
+ q += dos_PutUniCode(q, lp_workgroup(),
+ sizeof(pstring) - PTR_DIFF(q, outbuf),
+ True);
}
#ifdef HAVE_ADS
else {
@@ -366,7 +383,10 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
get_mydnsdomname(domain);
get_myname(hostname);
-
+
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
+ return;
+ }
if (SVAL(uniuser, 0) == 0) {
SIVAL(q, 0, SAMLOGON_AD_UNK_R); /* user unknown */
} else {
@@ -379,6 +399,9 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
q += 4;
/* Push Domain GUID */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < UUID_FLAT_SIZE) {
+ return;
+ }
if (False == secrets_fetch_domain_guid(domain, &domain_guid)) {
DEBUG(2, ("Could not fetch DomainGUID for %s\n", domain));
return;
@@ -394,12 +417,20 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
q1 = q;
while ((component = strtok(dc, "."))) {
dc = NULL;
- size = push_ascii(&q[1], component, -1, 0);
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
+ return;
+ }
+ size = push_ascii(&q[1], component,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
SCVAL(q, 0, size);
q += (size + 1);
}
/* Unk0 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
+ return;
+ }
SCVAL(q, 0, 0);
q++;
@@ -409,44 +440,74 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
q += 2;
/* Hostname */
- size = push_ascii(&q[1], hostname, -1, 0);
+ size = push_ascii(&q[1], hostname,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
SCVAL(q, 0, size);
q += (size + 1);
+
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 3) {
+ return;
+ }
+
SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
SCVAL(q, 1, str_offset & 0xFF);
q += 2;
/* NETBIOS of domain */
- size = push_ascii(&q[1], lp_workgroup(), -1, STR_UPPER);
+ size = push_ascii(&q[1], lp_workgroup(),
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ STR_UPPER);
SCVAL(q, 0, size);
q += (size + 1);
/* Unk1 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 2) {
+ return;
+ }
+
SCVAL(q, 0, 0);
q++;
/* NETBIOS of hostname */
- size = push_ascii(&q[1], my_name, -1, 0);
+ size = push_ascii(&q[1], my_name,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
SCVAL(q, 0, size);
q += (size + 1);
/* Unk2 */
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 4) {
+ return;
+ }
+
SCVAL(q, 0, 0);
q++;
/* User name */
if (SVAL(uniuser, 0) != 0) {
- size = push_ascii(&q[1], ascuser, -1, 0);
+ size = push_ascii(&q[1], ascuser,
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
SCVAL(q, 0, size);
q += (size + 1);
}
q_orig = q;
/* Site name */
- size = push_ascii(&q[1], "Default-First-Site-Name", -1, 0);
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 1) {
+ return;
+ }
+ size = push_ascii(&q[1], "Default-First-Site-Name",
+ sizeof(outbuf) - PTR_DIFF(q+1, outbuf),
+ 0);
SCVAL(q, 0, size);
q += (size + 1);
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 18) {
+ return;
+ }
+
/* Site name (2) */
str_offset = q - q_orig;
SCVAL(q, 0, 0xc0 | ((str_offset >> 8) & 0x3F));
@@ -467,6 +528,10 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
}
#endif
+ if (sizeof(outbuf) - PTR_DIFF(q, outbuf) < 8) {
+ return;
+ }
+
/* tell the client what version we are */
SIVAL(q, 0, ((ntversion < 11) || (SEC_ADS != lp_security())) ? 1 : 13);
/* our ntversion */
generated by cgit (git 2.34.1) at 2024-11-28 00:05:10 +0000