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Limit file creation/manipulation to luafiles subfolder

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Also block % in filename strings
This commit is contained in:
wolfy852 2016-01-20 22:35:53 -06:00
parent de03db99e7
commit 5579fb5240
1 changed files with 7 additions and 1 deletions
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8
src/blua/liolib.c
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@ -17,6 +17,9 @@
#include "lauxlib.h"
#include "lualib.h"
#include "../i_system.h"
#include "../doomdef.h"
#include "../m_misc.h"
@ -173,11 +176,14 @@ static int io_open (lua_State *L) {
}
}
if (strstr(filename, "..") || strchr(filename, ':') || StartsWith(filename, "\\")
|| StartsWith(filename, "/") || !pass)
|| StartsWith(filename, "/") || strchr(filename, '%') || !pass)
{
luaL_error(L,"access denied to %s", filename);
return pushresult(L,0,filename);
}
I_mkdir("luafiles", 0755);
char* destFilename = va("luafiles"PATHSEP"%s", filename);
filename = destFilename;
const char *mode = luaL_optstring(L, 2, "r");
FILE **pf = newfile(L);
*pf = fopen(filename, mode);