blob: 4649a561594bb89f8842dcd8d6922b1bc8ddc2e6 (
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--- tk8.4.17/generic/tkImgGIF.c.orig 2008-02-14 23:20:53.683962654 +0000
+++ tk8.4.17/generic/tkImgGIF.c 2008-02-14 23:21:42.762759495 +0000
@@ -826,6 +826,12 @@
Tcl_PosixError(interp), (char *) NULL);
return TCL_ERROR;
}
+
+ if (initialCodeSize > MAX_LWZ_BITS) {
+ Tcl_SetResult(interp, "malformed image", TCL_STATIC);
+ return TCL_ERROR;
+ }
+
if (transparent != -1) {
cmap[transparent][CM_RED] = 0;
cmap[transparent][CM_GREEN] = 0;
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