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[libpng12] Ignore, with a warning, out-of-range value of num_trans 

in png_set_tRNS().
This commit is contained in:
Glenn Randers-Pehrson 2012-12-10 10:10:08 -06:00
parent f54a50aa4e
commit 15c57f2a43
3 changed files with 34 additions and 27 deletions
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47
ANNOUNCE
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@ -1,53 +1,50 @@
Libpng 1.2.50 - July 10, 2012
Libpng 1.2.51beta01 - December 10, 2012
This is a public release of libpng, intended for use in production codes.
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
Files available for download:
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
libpng-1.2.50.tar.xz (LZMA-compressed, recommended)
libpng-1.2.50.tar.gz
libpng-1.2.50.tar.bz2
libpng-1.2.51beta01.tar.xz (LZMA-compressed, recommended)
libpng-1.2.51beta01.tar.gz
libpng-1.2.51beta01.tar.bz2
Source files with LF line endings (for Unix/Linux) without the
"configure" script
libpng-1.2.50-no-config.tar.xz (LZMA-compressed, recommended)
libpng-1.2.50-no-config.tar.gz
libpng-1.2.50-no-config.tar.bz2
libpng-1.2.51beta01-no-config.tar.xz (LZMA-compressed, recommended)
libpng-1.2.51beta01-no-config.tar.gz
libpng-1.2.51beta01-no-config.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
lpng1250.zip
lpng1250.7z
lpng1250.tar.bz2
lp1251b01.zip
lp1251b01.7z
lp1251b01.tar.bz2
Project files
libpng-1.2.50-project-netware.zip
libpng-1.2.50-project-wince.zip
libpng-1.2.51beta01-project-netware.zip
libpng-1.2.51beta01-project-wince.zip
Other information:
libpng-1.2.50-README.txt
libpng-1.2.50-KNOWNBUGS.txt
libpng-1.2.50-LICENSE.txt
libpng-1.2.50-Y2K-compliance.txt
libpng-1.2.50-[previous version]-diff.txt
libpng-1.2.51beta01-README.txt
libpng-1.2.51beta01-KNOWNBUGS.txt
libpng-1.2.51beta01-LICENSE.txt
libpng-1.2.51beta01-Y2K-compliance.txt
libpng-1.2.51beta01-[previous version]-diff.txt
Changes since the last public release (1.2.49):
Changes since the last public release (1.2.50):
version 1.2.50 [July 10, 2012]
version 1.2.51beta01 [December 10, 2012]
Ignore, with a warning, out-of-range value of num_trans in png_set_tRNS().
version 1.0.60 and 1.2.50 [July 8, 2012]
Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net

6
CHANGES
View File

@ -2771,12 +2771,16 @@ version 1.0.58 and 1.2.48 [March 8, 2012]
version 1.0.59 and 1.2.49 [March 29, 2012]
Revised png_set_text_2() to avoid potential memory corruption (fixes
CVE-2011-3048).
CVE-2011-3048, also known as CVE-2012-3425).
Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice.
version 1.0.60 and 1.2.50 [July 9, 2012]
Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
version 1.2.51beta01 [December 10, 2012]
Rebuilt the configure scripts with autoconf-2.69
Ignore, with a warning, out-of-range value of num_trans in png_set_tRNS().
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement

8
pngset.c
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@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.2.49 [March 29, 2012]
* Last changed in libpng 1.2.51 [December 10, 2012]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -850,6 +850,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr, "Ignoring invalid num_trans value");
return;
}
if (trans != NULL)
{
/* It may not actually be necessary to set png_ptr->trans here;