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[libpng15] Fixed an out-of-range read in png_check_keyword() (Bug report

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from Qixue Xiao).
This commit is contained in:
Glenn Randers-Pehrson 2015-12-09 09:40:48 -06:00
parent 93e111afc5
commit d9006f683c
3 changed files with 21 additions and 18 deletions
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30
ANNOUNCE
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@ -1,36 +1,34 @@
Libpng 1.5.25 - December 3, 2015
Libpng 1.5.26beta01 - December 9, 2015
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-1.5.25.tar.xz (LZMA-compressed, recommended)
libpng-1.5.25.tar.gz
1.5.26beta01.tar.xz (LZMA-compressed, recommended)
1.5.26beta01.tar.gz
Source files with CRLF line endings (for Windows), without the
"configure" script
lpng1525.7z (LZMA-compressed, recommended)
lpng1525.zip
lp1526b01.7z (LZMA-compressed, recommended)
lp1526b01.zip
Other information:
libpng-1.5.25-README.txt
libpng-1.5.25-LICENSE.txt
libpng-1.5.25-*.asc (armored detached GPG signatures)
1.5.26beta01-README.txt
1.5.26beta01-LICENSE.txt
libpng-1.5.26beta01-*.asc (armored detached GPG signatures)
Changes since the last public release (1.5.24):
Changes since the last public release (1.5.25):
Avoid potential pointer overflow in png_handle_iTXt(), png_handle_zTXt(),
png_handle_sPLT(), and png_handle_pCAL() (Bug report by John Regehr).
Fixed incorrect implementation of png_set_PLTE() that uses png_ptr
not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126
vulnerability.
Backported tests from libpng-1.7.0beta69.
version 1.5.26 [December 9, 2015]
Fixed an out-of-range read in png_check_keyword() (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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@ -4431,7 +4431,7 @@ version 1.5.25beta01 [November 20, 2015]
version 1.5.25beta02 [November 23, 2015]
Fixed incorrect implementation of png_set_PLTE() that uses png_ptr
not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126
vulnerability.
vulnerability. Fixes CVE-2015-8472.
version 1.5.25beta03 [November 24, 2015]
Backported tests from libpng-1.7.0beta69.
@ -4440,6 +4440,11 @@ version 1.5.25rc01 [November 26, 2015]
No changes.
version 1.5.25 [December 3, 2015]
No changes.
version 1.5.26beta01 [December 9, 2015]
Fixed an out-of-range read in png_check_keyword() (Bug report from
Qixue Xiao).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
pngwutil.c
View File

@ -1580,7 +1580,7 @@ png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
{
png_warning(png_ptr, "trailing spaces removed from keyword");
while (*kp == ' ')
while (key_len && *kp == ' ')
{
*(kp--) = '\0';
key_len--;