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Patch for bug 208464 as backported by the Pardus people.
--- pTk/mTk/generic/tkImgGIF.c.orig 2008-02-05 11:38:58.000000000 +0100
+++ pTk/mTk/generic/tkImgGIF.c 2008-02-05 11:42:46.000000000 +0100
@@ -831,6 +831,12 @@
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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