22ead36c3c
CVE-2004-0941 CVE-2007-0455 CVE-2007-2756 CVE-2007-3472 CVE-2007-3473 CVE-2007-3477 CVE-2009-3546 CVE-2015-0848 CVE-2015-4588 CVE-2015-4695 CVE-2015-4696 Obtained from: CentOS libwmf RPM git Debian Bug 784205 Debian Bug 784192 Red Hat Bug 1227243 via Jason Unovitch in FreeBSD bug 201513 Reviewed by bsiegert@
131 lines
3.5 KiB
Text
131 lines
3.5 KiB
Text
$NetBSD: patch-aa,v 1.8 2015/07/17 12:33:47 sevan Exp $
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Fix build with png-1.5.
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https://sourceforge.net/tracker/?func=detail&aid=3164737&group_id=10501&atid=110501
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CVE-2015-4588 - Heap-based buffer overflow in the DecodeImage function in libwmf
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0.2.8.4 allows remote attackers to cause a denial of service (crash) or possibly
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execute arbitrary code via a crafted "run-length count" in an image in a WMF
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file.
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CVE-2015-0848 - Heap-based buffer overflow in libwmf 0.2.8.4 allows remote
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attackers to cause a denial of service (crash) or possibly execute arbitrary
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code via a crafted BMP image.
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--- src/ipa/ipa/bmp.h.orig 2015-07-17 11:09:09.000000000 +0000
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+++ src/ipa/ipa/bmp.h
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@@ -66,7 +66,7 @@ static void ldr_bmp_png (wmfAPI* API,wmf
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return;
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}
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- if (setjmp (png_ptr->jmpbuf))
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+ if (setjmp (png_jmpbuf(png_ptr)))
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{ WMF_DEBUG (API,"Failed to write bitmap as PNG! (setjmp failed)");
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png_destroy_write_struct (&png_ptr,&info_ptr);
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wmf_free (API,buffer);
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@@ -859,7 +859,7 @@ static long TellBlob (BMPSource* src)
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%
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%
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*/
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-static void DecodeImage (wmfAPI* API,wmfBMP* bmp,BMPSource* src,unsigned int compression,unsigned char* pixels)
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+static int DecodeImage (wmfAPI* API,wmfBMP* bmp,BMPSource* src,unsigned int compression,unsigned char* pixels)
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{ int byte;
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int count;
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int i;
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@@ -870,12 +870,14 @@ static void DecodeImage (wmfAPI* API,wmf
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U32 u;
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unsigned char* q;
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+ unsigned char* end;
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for (u = 0; u < ((U32) bmp->width * (U32) bmp->height); u++) pixels[u] = 0;
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byte = 0;
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x = 0;
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q = pixels;
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+ end = pixels + bmp->width * bmp->height;
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for (y = 0; y < bmp->height; )
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{ count = ReadBlobByte (src);
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@@ -884,7 +886,10 @@ static void DecodeImage (wmfAPI* API,wmf
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{ /* Encoded mode. */
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byte = ReadBlobByte (src);
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for (i = 0; i < count; i++)
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- { if (compression == 1)
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+ {
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+ if (q == end)
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+ return 0;
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+ if (compression == 1)
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{ (*(q++)) = (unsigned char) byte;
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}
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else
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@@ -896,13 +901,15 @@ static void DecodeImage (wmfAPI* API,wmf
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else
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{ /* Escape mode. */
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count = ReadBlobByte (src);
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- if (count == 0x01) return;
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+ if (count == 0x01) return 1;
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switch (count)
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{
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case 0x00:
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{ /* End of line. */
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x = 0;
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y++;
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+ if (y >= bmp->height)
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+ return 0;
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q = pixels + y * bmp->width;
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break;
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}
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@@ -910,13 +917,20 @@ static void DecodeImage (wmfAPI* API,wmf
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{ /* Delta mode. */
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x += ReadBlobByte (src);
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y += ReadBlobByte (src);
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+ if (y >= bmp->height)
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+ return 0;
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+ if (x >= bmp->width)
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+ return 0;
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q = pixels + y * bmp->width + x;
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break;
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}
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default:
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{ /* Absolute mode. */
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for (i = 0; i < count; i++)
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- { if (compression == 1)
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+ {
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+ if (q == end)
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+ return 0;
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+ if (compression == 1)
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{ (*(q++)) = ReadBlobByte (src);
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}
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else
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@@ -943,7 +957,7 @@ static void DecodeImage (wmfAPI* API,wmf
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byte = ReadBlobByte (src); /* end of line */
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byte = ReadBlobByte (src);
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- return;
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+ return 1;
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}
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/*
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@@ -1143,8 +1157,20 @@ static void ReadBMPImage (wmfAPI* API,wm
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}
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}
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else
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- { /* Convert run-length encoded raster pixels. */
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- DecodeImage (API,bmp,src,(unsigned int) bmp_info.compression,data->image);
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+ {
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+ if (bmp_info.bits_per_pixel == 8) /* Convert run-length encoded raster pixels. */
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+ {
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+ if (!DecodeImage (API,bmp,src,(unsigned int) bmp_info.compression,data->image))
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+ {
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+ WMF_ERROR (API,"corrupt bmp");
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+ API->err = wmf_E_BadFormat;
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+ }
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+ }
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+ else
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+ {
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+ WMF_ERROR (API,"Unexpected pixel depth");
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+ API->err = wmf_E_BadFormat;
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+ }
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}
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if (ERR (API))
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