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authorLance <Lance@54d463be-8e91-2dee-dedb-b68131a5f0ec>2006-05-21 02:37:36 +0000
committerLance <Lance@54d463be-8e91-2dee-dedb-b68131a5f0ec>2006-05-21 02:37:36 +0000
commitd84d35044f5371ff5ed28a406a672bc455ab66ef (patch)
treec473f0256230b7e83065c1952f61f8294a58496c /src/map
parentcc8f41cb4f4af81d03bb48bc7878cee914337e0f (diff)
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* Exploit prevention in clif_parse_NpcStringInput
git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@6670 54d463be-8e91-2dee-dedb-b68131a5f0ec
Diffstat (limited to 'src/map')
-rw-r--r--src/map/clif.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/src/map/clif.c b/src/map/clif.c
index 1a52a33d1..e98d8e363 100644
--- a/src/map/clif.c
+++ b/src/map/clif.c
@@ -9800,14 +9800,18 @@ void clif_parse_NpcAmountInput(int fd,struct map_session_data *sd)
*/
void clif_parse_NpcStringInput(int fd,struct map_session_data *sd)
{
+ unsigned short message_len = RFIFOW(fd,2)-7;
RFIFOHEAD(fd);
- if(RFIFOW(fd,2)-7 >= sizeof(sd->npc_str)){
+ if(message_len >= sizeof(sd->npc_str)){
ShowWarning("clif: input string too long !\n");
- memcpy(sd->npc_str,RFIFOP(fd,8),sizeof(sd->npc_str));
- sd->npc_str[sizeof(sd->npc_str)-1]=0;
- } else
- strcpy(sd->npc_str,(char*)RFIFOP(fd,8));
+ message_len = sizeof(sd->npc_str);
+ }
+
+ // Exploit prevention if crafted packets (without null) is being sent. [Lance]
+ memcpy(sd->npc_str,RFIFOP(fd,8),message_len);
+ sd->npc_str[message_len-1]=0;
+
npc_scriptcont(sd,RFIFOL(fd,4));
}