|Reported by:||Fernando de Oliveira||Owned by:||Fernando de Oliveira|
Description (last modified by )
I understand after post:
that this release fixes a vulnerability:
Vulnerability Summary for CVE-2015-8126 Original release date: 11/12/2015 Last revised: 11/12/2015 Source: US-CERT/NIST This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary. Overview Multiple buffer overflows in the (1) png_set_PLTE and (2) png_get_PLTE functions in libpng before 1.0.64, 1.1.x and 1.2.x before 1.2.54, 1.3.x and 1.4.x before 1.4.17, 1.5.x before 1.5.24, and 1.6.x before 1.6.19 allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a small bit-depth value in an IHDR (aka image header) chunk in a PNG image.
Patch not yet released. Will not place in hold, because usually takes a couple of days to be released, when it is not already available.
[png-mng-implement] libpng-1.0.64, 1.4.17, 1.2.54, 1.5.24, and libpng-1.6.19 are available From: Glenn Randers-Pehrson <glennrp@gm...> - 2015-11-12 16:08:46 Attachments: Message as HTML libpng-1.0.64, 1.2.54, 1.4.17, 1.5.24, and libpng-1.6.19 are available from ftp:ftp.simplesystems.org/pub/png/src/ and from http://libpng.sf.net These are security releases that fix a potential out-of-bounds read in png_set_tIME()/png_convert_to_rfc1123() and a potential out-of-bounds write in png_get_PLTE()/png_set_PLTE() in all previous versions. Glenn Libpng 1.6.19 - November 12, 2015 Changes since the last public release (1.6.18): Updated obsolete information about the simplified API macros in the manual pages (Bug report by Arc Riley). Avoid potentially dereferencing NULL info_ptr in png_info_init_3(). Rearranged png.h to put the major sections in the same order as in libpng17. Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and PNG_WEIGHT_FACTOR macros. Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler (Bug report by Viktor Szakats). Several warnings remain and are unavoidable, where we test for overflow. Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c Fixed uninitialized variable in contrib/gregbook/rpng2-x.c Moved config.h.in~ from the "libpng_autotools_files" list to the "libpng_autotools_extra" list in autogen.sh because it was causing a false positive for missing files (bug report by Robert C. Seacord). Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c to suppress clang warnings (Bug report by Viktor Szakats). Fixed some bad links in the man page. Changed "n bit" to "n-bit" in comments. Added signed/unsigned 16-bit safety net. This removes the dubious 0x8000 flag definitions on 16-bit systems. They aren't supported yet the defs *probably* work, however it seems much safer to do this and be advised if anyone, contrary to advice, is building libpng 1.6 on a 16-bit system. It also adds back various switch default clauses for GCC; GCC errors out if they are not present (with an appropriately high level of warnings). Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert Seacord). Fixed the recently reported 1's complement security issue by replacing the value that is illegal in the PNG spec, in both signed and unsigned values, with 0. Illegal unsigned values (anything greater than or equal to 0x80000000) can still pass through, but since these are not illegal in ANSI-C (unlike 0x80000000 in the signed case) the checking that occurs later can catch them (John Bowler). Fixed png_save_int_32 when int is not 2's complement (John Bowler). Updated libpng16 with all the recent test changes from libpng17, including changes to pngvalid.c to ensure that the original, distributed, version of contrib/visupng/cexcept.h can be used (John Bowler). pngvalid contains the correction to the use of SAVE/STORE_ UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More tests contain the --strict option to detect warnings and the pngvalid-standard test has been corrected so that it does not turn on progressive-read. There is a separate test which does that. (John Bowler) Also made some signed/unsigned fixes. Make pngstest error limits version specific. Splitting the machine generated error structs out to a file allows the values to be updated without changing pngstest.c itself. Since libpng 1.6 and 1.7 have slightly different error limits this simplifies maintenance. The makepngs.sh script has also been updated to more accurately reflect current problems in libpng 1.7 (John Bowler). Incorporated new test PNG files into make check. tests/pngstest-* are changed so that the new test files are divided into 8 groups by gamma and alpha channel. These tests have considerably better code and pixel-value coverage than contrib/pngsuite; however,coverage is still incomplete (John Bowler). Removed the '--strict' in 1.6 because of the double-gamma-correction warning, updated pngstest-errors.h for the errors detected with the new contrib/testspngs PNG test files (John Bowler). Worked around rgb-to-gray issues in libpng 1.6. The previous attempts to ignore the errors in the code aren't quite enough to deal with the 'channel selection' encoding added to libpng 1.7; abort. Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a macro, therefore the argument list cannot contain preprocessing directives. Make sure pow is a function where this happens. This is a minimal safe fix, the issue only arises in non-performance-critical code (bug report by Curtis Leach, fix by John Bowler). Added sPLT support to pngtest.c Prevent setting or writing over-length PLTE chunk (Cosmin Truta). Silently truncate over-length PLTE chunk while reading. Libpng incorrectly calculated the output rowbytes when the application decreased either the number of channels or the bit depth (or both) in a user transform. This was safe; libpng overallocated buffer space (potentially by quite a lot; up to 4 times the amount required) but, from 1.5.4 on, resulted in a png_error (John Bowler). Fixed some inconsequential cut-and-paste typos in png_set_cHRM_XYZ_fixed(). Clarified COPYRIGHT information to state explicitly that versions are derived from previous versions. Removed much of the long list of previous versions from png.h and libpng.3.
Libpng 1.6.19 - July 23, 2015 This is a public release of libpng, intended for use in production codes. Changes since the last public release (1.6.17): Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves bug report by Andrew Church). Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This fixes some arithmetic errors that caused some tests to fail on some 32-bit platforms (Bug reports by Peter Breitenlohner [i686] and Petr Gajdos [i586]). Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler (Bug report by Viktor Szaka'ts). Replaced "unexpected" with an integer (0xabadca11) in pngset.c where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1. Added contrib/examples/simpleover.c, to demonstrate how to handle alpha compositing of multiple images, using the "simplified API" and an example PNG generation tool, contrib/examples/genpng.c (John Bowler). PNG_RELEASE_BUILD replaces tests where the code depended on the build base type and can be defined on the command line, allowing testing in beta builds (John Bowler). Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug report from Christopher Ferris). Backport filter selection code from libpng-1.7.0beta51, to combine sub_row, up_row, avg_row, and paeth_row into try_row and tst_row. Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c to avoid confusion with the libpng private macros. Fixed old cut&paste bug in the weighted filter selection code in pngwutil.c, introduced in libpng-0.95, March 1997. Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the compiled library size. It never worked properly and as far as we can tell, no one uses it. The png_set_filter_heuristics() and png_set_filter_heuristics_fixed() APIs are retained but deprecated and do nothing. Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt would only work with iTXt chunks with length 255 or less. Removed non-working progressive reader 'skip' function. This function has apparently never been used. It was implemented to support back-door modification of png_struct in libpng-1.4.x but (because it does nothing and cannot do anything) was apparently never tested (John Bowler). Fixed cexcept.h in which GCC 5 now reports that one of the auto variables in the Try macro needs to be volatile to prevent value being lost over the setjmp (John Bowler). Added #ifdef's to contrib/examples programs so people don't try to compile them without the minimum required support enabled (suggested by Flavio Medeiros). Eliminated the final two Coverity defects (insecure temporary file handling in contrib/libtests/pngstest.c; possible overflow of unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure" file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will be used. Removed some unused WEIGHTED_FILTER macros from pngstruct.h Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To preserve API compatibility, the new defines all default to "extern" (requested by Jan Nijtmans). Belatedly added Mans Rullgard and James Yu to the list of Contributing Authors. Glenn R-P
Updated to libpng-1.6.19 codebase