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[libpng12] Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).

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This commit is contained in:
Glenn Randers-Pehrson 2015-10-23 08:44:51 -05:00
parent cfd5b1a23f
commit fbf0f02434
4 changed files with 24 additions and 9 deletions
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6
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.2.54beta01 - July 30, 2015
Libpng 1.2.54beta01 - 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.
@ -43,7 +43,7 @@ Other information:
Changes since the last public release (1.2.53):
version 1.2.54beta01 [July 30, 2015]
version 1.2.54beta01 [October 23, 2015]
Fix typecast in a png_debug2() statement in png_set_text_2() to
avoid a compiler warning in PNG_DEBUG builds.
Fixed printf formats in pngtest.c to avoid compiler warnings and a
@ -54,6 +54,8 @@ version 1.2.54beta01 [July 30, 2015]
Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c
because usleep() is deprecated (port from libpng16).
Fixed some bad links in the man page.
Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

7
CHANGES
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@ -993,6 +993,7 @@ version 1.2.0beta3 [May 17, 2001]
Modified png_create_struct so it passes user mem_ptr to user memory allocator.
Increased png_mng_features flag from png_byte to png_uint_32.
Bumped shared-library (so-number) and dll-number to 3.
version 1.0.12 [June 8, 2001]
version 1.2.0beta4 [June 23, 2001]
Check for missing profile length field in iCCP chunk and free chunk_data
in case of truncated iCCP chunk.
@ -1418,7 +1419,7 @@ version 1.2.8rc4 [November 29, 2004]
version 1.2.8rc5 [November 29, 2004]
Fixed new typo in scripts/pngw32.rc
version 1.2.8 [December 3, 2004]
version 1.0.18, 1.2.8 [December 3, 2004]
Removed projects/visualc7, added projects/visualc71.
version 1.2.9beta1 [February 21, 2006]
@ -2858,7 +2859,7 @@ version 1.2.53rc02 [February 21, 2015]
versions 1.0.63 and 1.2.53 [February 26, 2015]
No changes.
version 1.2.54beta01 [July 30, 2015]
version 1.2.54beta01 [October 23, 2015]
Fixed typecast in a png_debug2() statement in png_set_text_2() to
avoid a compiler warning in PNG_DEBUG builds.
Fixed printf formats in pngtest.c to avoid compiler warnings and a
@ -2869,6 +2870,8 @@ version 1.2.54beta01 [July 30, 2015]
Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c
because usleep() is deprecated (port from libpng16).
Fixed some bad links in the man page.
Added a safety check in png_set_tIME() (Bug report from Qixue Xiao).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

11
png.c
View File

@ -681,6 +681,7 @@ 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*
@ -691,7 +692,7 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{
wchar_t time_buf[29];
wsprintf(time_buf, TEXT("%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);
WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer,
@ -702,7 +703,7 @@ 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,
@ -710,7 +711,7 @@ 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
@ -730,13 +731,13 @@ png_get_copyright(png_structp png_ptr)
#else
#ifdef __STDC__
return ((png_charp) PNG_STRING_NEWLINE \
"libpng version 1.2.54beta01 - July 30, 2015" PNG_STRING_NEWLINE \
"libpng version 1.2.54beta01 - 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 1.2.54beta01 - July 30, 2015\
return ((png_charp) "libpng version 1.2.54beta01 - 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.");

9
pngset.c
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@ -837,6 +837,15 @@ 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;
}