user/djvulibre: patch CVE-2019-18804 (#237)

1 files changed, 39 insertions, 0 deletions

diff --git a/user/djvulibre/CVE-2019-18804.patch b/user/djvulibre/CVE-2019-18804.patch
new file mode 100644
index 000000000..7c66c3989
--- /dev/null
+++ b/user/djvulibre/CVE-2019-18804.patch
@@ -0,0 +1,39 @@
+From c8bec6549c10ffaa2f2fbad8bbc629efdf0dd125 Mon Sep 17 00:00:00 2001
+From: Leon Bottou <leon@bottou.org>
+Date: Thu, 17 Oct 2019 22:20:31 -0400
+Subject: [PATCH] Fixed bug 309
+
+---
+ libdjvu/IW44EncodeCodec.cpp | 2 +-
+ tools/ddjvu.cpp             | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libdjvu/IW44EncodeCodec.cpp b/libdjvu/IW44EncodeCodec.cpp
+index 00752a0..f81eaeb 100644
+--- a/libdjvu/IW44EncodeCodec.cpp
++++ b/libdjvu/IW44EncodeCodec.cpp
+@@ -405,7 +405,7 @@ filter_fv(short *p, int w, int h, int rowsize, int scale)
+   int y = 0;
+   int s = scale*rowsize;
+   int s3 = s+s+s;
+-  h = ((h-1)/scale)+1;
++  h = (h>0) ? ((h-1)/scale)+1 : 0;
+   y += 1;
+   p += s;
+   while (y-3 < h)
+diff --git a/tools/ddjvu.cpp b/tools/ddjvu.cpp
+index 6d0df3b..7109952 100644
+--- a/tools/ddjvu.cpp
++++ b/tools/ddjvu.cpp
+@@ -279,7 +279,7 @@ render(ddjvu_page_t *page, int pageno)
+       prect.h = (ih * 100) / dpi;
+     }
+   /* Process aspect ratio */
+-  if (flag_aspect <= 0)
++  if (flag_aspect <= 0 && iw>0 && ih>0)
+     {
+       double dw = (double)iw / prect.w;
+       double dh = (double)ih / prect.h;
+-- 
+2.20.1
+