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$NetBSD: patch-SA43593,v 1.1.2.2 2011/03/13 21:10:19 sbd Exp $
Fix heap-based buffer overflow which causes the vulnerability reported
in SA43593. Patch taken from the "libtiff" CVS repository.
--- libtiff/tif_fax3.h 8 Jun 2010 18:50:42 -0000 1.5.2.1
+++ libtiff/tif_fax3.h 10 Mar 2011 20:22:33 -0000 1.5.2.3
@@ -478,6 +478,12 @@
break; \
case S_VL: \
CHECK_b1; \
+ if (b1 <= (int) (a0 + TabEnt->Param)) { \
+ if (b1 < (int) (a0 + TabEnt->Param) || pa != thisrun) { \
+ unexpected("VL", a0); \
+ goto eol2d; \
+ } \
+ } \
SETVALUE(b1 - a0 - TabEnt->Param); \
b1 -= *--pb; \
break; \
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