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[libpng14] Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).

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Glenn Randers-Pehrson 2015-10-23 09:01:31 -05:00
parent 67c4bc9f5c
commit 52c89ad053
4 changed files with 20 additions and 8 deletions
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5
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.4.17beta03 - October 15, 2015
Libpng 1.4.17beta03 - October 23, 2015
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.
@ -53,7 +53,8 @@ version 1.4.17beta02 [October 15, 2015]
Fixed png_save_int_32 when int is not 2's complement (John Bowler).
Added sPLT support to pngtest.c
version 1.4.17beta03 [October 15, 2015]
version 1.4.17beta03 [October 23, 2015]
Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).
Send comments/corrections/commendations to glennrp at users.sourceforge.net
or to png-mng-implement at lists.sf.net (subscription required; visit

3
CHANGES
View File

@ -2983,7 +2983,8 @@ version 1.4.17beta02 [October 15, 2015]
Fixed png_save_int_32 when int is not 2's complement (John Bowler).
Added sPLT support to pngtest.c
version 1.4.17beta03 [October 15, 2015]
version 1.4.17beta03 [October 23, 2015]
Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).
Send comments/corrections/commendations to glennrp at users.sourceforge.net
or to png-mng-implement at lists.sf.net (subscription required; visit

9
png.c
View File

@ -520,6 +520,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
if (png_ptr == NULL)
return (NULL);
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
@ -530,7 +531,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{
char near_time_buf[29];
png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->day % 32, short_months[(ptime->month - 1U) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
png_memcpy(png_ptr->time_buffer, near_time_buf,
@ -538,7 +539,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
}
#else
png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->day % 32, short_months[(ptime->month - 1U) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
#endif
@ -557,13 +558,13 @@ png_get_copyright(png_const_structp png_ptr)
#else
#ifdef __STDC__
return ((png_charp) PNG_STRING_NEWLINE \
"libpng version 1.4.17beta03 - October 15, 2015" PNG_STRING_NEWLINE \
"libpng version 1.4.17beta03 - October 23, 2015" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2015 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE);
#else
return ((png_charp) "libpng version 1.4.17beta03 - October 15, 2015\
return ((png_charp) "libpng version 1.4.17beta03 - October 23, 2015\
Copyright (c) 1998-2015 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");

11
pngset.c
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@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.4.17 [October 15, 2015]
* Last changed in libpng 1.4.17 [October 23, 2015]
* Copyright (c) 1998-2015 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.)
@ -809,6 +809,15 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
(png_ptr->mode & PNG_WROTE_tIME))
return;
if (mod_time->month == 0 || mod_time->month > 12 ||
mod_time->day == 0 || mod_time->day > 31 ||
mod_time->hour > 23 || mod_time->minute > 59 ||
mod_time->second > 60)
{
png_warning(png_ptr, "Ignoring invalid time value");
return;
}
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
info_ptr->valid |= PNG_INFO_tIME;
}