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Upgrade expat from 2.2.8 -> 2.4.6 to include the security fixes from 2.4.5 Release 2.4.6 Sun February 20 2022 Bug fixes: #566 Fix a regression introduced by the fix for CVE-2022-25313 in release 2.4.5 that affects applications that (1) call function XML_SetElementDeclHandler and (2) are parsing XML that contains nested element declarations (e.g. "<!ELEMENT junk ((bar|foo|xyz+), zebra*)>"). Other changes: #567 #568 Version info bumped from 9:5:8 to 9:6:8; see https://verbump.de/ for what these numbers do Special thanks to: Matt Sergeant Samanta Navarro Sergei Trofimovich and NixOS Perl XML::Parser Release 2.4.5 Fri February 18 2022 Security fixes: #562 CVE-2022-25235 -- Passing malformed 2- and 3-byte UTF-8 sequences (e.g. from start tag names) to the XML processing application on top of Expat can cause arbitrary damage (e.g. code execution) depending on how invalid UTF-8 is handled inside the XML processor; validation was not their job but Expat's. Exploits with code execution are known to exist. #561 CVE-2022-25236 -- Passing (one or more) namespace separator characters in "xmlns[:prefix]" attribute values made Expat send malformed tag names to the XML processor on top of Expat which can cause arbitrary damage (e.g. code execution) depending on such unexpectable cases are handled inside the XML processor; validation was not their job but Expat's. Exploits with code execution are known to exist. #558 CVE-2022-25313 -- Fix stack exhaustion in doctype parsing that could be triggered by e.g. a 2 megabytes file with a large number of opening braces. Expected impact is denial of service or potentially arbitrary code execution. #560 CVE-2022-25314 -- Fix integer overflow in function copyString; only affects the encoding name parameter at parser creation time which is often hardcoded (rather than user input), takes a value in the gigabytes to trigger, and a 64-bit machine. Expected impact is denial of service. #559 CVE-2022-25315 -- Fix integer overflow in function storeRawNames; needs input in the gigabytes and a 64-bit machine. Expected impact is denial of service or potentially arbitrary code execution. Other changes: #557 #564 Version info bumped from 9:4:8 to 9:5:8; see https://verbump.de/ for what these numbers do Special thanks to: Ivan Fratric Samanta Navarro and Google Project Zero JetBrains Release 2.4.4 Sun January 30 2022 Security fixes: #550 CVE-2022-23852 -- Fix signed integer overflow (undefined behavior) in function XML_GetBuffer (that is also called by function XML_Parse internally) for when XML_CONTEXT_BYTES is defined to >0 (which is both common and default). Impact is denial of service or more. #551 CVE-2022-23990 -- Fix unsigned integer overflow in function doProlog triggered by large content in element type declarations when there is an element declaration handler present (from a prior call to XML_SetElementDeclHandler). Impact is denial of service or more. Bug fixes: #544 #545 xmlwf: Fix a memory leak on output file opening error Other changes: #546 Autotools: Fix broken CMake support under Cygwin #554 Windows: Add missing files to the installer to fix compilation with CMake from installed sources #552 #554 Version info bumped from 9:3:8 to 9:4:8; see https://verbump.de/ for what these numbers do Special thanks to: Carlo Bramini hwt0415 Roland Illig Samanta Navarro and Clang LeakSan and the Clang team Release 2.4.3 Sun January 16 2022 Security fixes: #531 #534 CVE-2021-45960 -- Fix issues with left shifts by >=29 places resulting in a) realloc acting as free b) realloc allocating too few bytes c) undefined behavior depending on architecture and precise value for XML documents with >=2^27+1 prefixed attributes on a single XML tag a la "<r xmlns:a='[..]' a:a123='[..]' [..] />" where XML_ParserCreateNS is used to create the parser (which needs argument "-n" when running xmlwf). Impact is denial of service, or more. #532 #538 CVE-2021-46143 (ZDI-CAN-16157) -- Fix integer overflow on variable m_groupSize in function doProlog leading to realloc acting as free. Impact is denial of service or more. #539 CVE-2022-22822 to CVE-2022-22827 -- Prevent integer overflows near memory allocation at multiple places. Mitre assigned a dedicated CVE for each involved internal C function: - CVE-2022-22822 for function addBinding - CVE-2022-22823 for function build_model - CVE-2022-22824 for function defineAttribute - CVE-2022-22825 for function lookup - CVE-2022-22826 for function nextScaffoldPart - CVE-2022-22827 for function storeAtts Impact is denial of service or more. Other changes: #535 CMake: Make call to file(GENERATE [..]) work for CMake <3.19 #541 Autotools|CMake: MinGW: Make run.sh(.in) work for Cygwin and MSYS2 by not going through Wine on these platforms #527 #528 Address compiler warnings #533 #543 Version info bumped from 9:2:8 to 9:3:8; see https://verbump.de/ for what these numbers do Infrastructure: #536 CI: Check for realistic minimum CMake version #529 #539 CI: Cover compilation with -m32 #529 CI: Store coverage reports as artifacts for download #528 CI: Upgrade Clang from 11 to 13 Special thanks to: An anonymous whitehat Christopher Degawa J. Peter Mugaas Tyson Smith and GCC Farm Project Trend Micro Zero Day Initiative Release 2.4.2 Sun December 19 2021 Other changes: #509 #510 Link againgst libm for function "isnan" #513 #514 Include expat_config.h as early as possible #498 Autotools: Include files with release archives: - buildconf.sh - fuzz/*.c #507 #519 Autotools: Sync CMake templates #495 #524 CMake: MinGW: Fix pkg-config section "Libs" for - non-release build types (e.g. -DCMAKE_BUILD_TYPE=Debug) - multi-config CMake generators (e.g. Ninja Multi-Config) #502 #503 docs: Document that function XML_GetBuffer may return NULL when asking for a buffer of 0 (zero) bytes size #522 #523 docs: Fix return value docs for both XML_SetBillionLaughsAttackProtection* functions #525 #526 Version info bumped from 9:1:8 to 9:2:8; see https://verbump.de/ for what these numbers do Special thanks to: Dong-hee Na Joergen Ibsen Kai Pastor Release 2.4.1 Sun May 23 2021 Bug fixes: #488 #490 Autotools: Fix installed header expat_config.h for multilib systems; regression introduced in 2.4.0 by pull request #486 Other changes: #491 #492 Version info bumped from 9:0:8 to 9:1:8; see https://verbump.de/ for what these numbers do Special thanks to: Gentoo's QA check "multilib_check_headers" Release 2.4.0 Sun May 23 2021 Security fixes: #34 #466 #484 CVE-2013-0340/CWE-776 -- Protect against billion laughs attacks (denial-of-service; flavors targeting CPU time or RAM or both, leveraging general entities or parameter entities or both) by tracking and limiting the input amplification factor (<amplification> := (<direct> + <indirect>) / <direct>). By conservative default, amplification up to a factor of 100.0 is tolerated and rejection only starts after 8 MiB of output bytes (=<direct> + <indirect>) have been processed. The fix adds the following to the API: - A new error code XML_ERROR_AMPLIFICATION_LIMIT_BREACH to signals this specific condition. - Two new API functions .. - XML_SetBillionLaughsAttackProtectionMaximumAmplification and - XML_SetBillionLaughsAttackProtectionActivationThreshold .. to further tighten billion laughs protection parameters when desired. Please see file "doc/reference.html" for details. If you ever need to increase the defaults for non-attack XML payload, please file a bug report with libexpat. - Two new XML_FEATURE_* constants .. - that can be queried using the XML_GetFeatureList function, and - that are shown in "xmlwf -v" output. - Two new environment variable switches .. - EXPAT_ACCOUNTING_DEBUG=(0|1|2|3) and - EXPAT_ENTITY_DEBUG=(0|1) .. for runtime debugging of accounting and entity processing. Specific behavior of these values may change in the future. - Two new command line arguments "-a FACTOR" and "-b BYTES" for xmlwf to further tighten billion laughs protection parameters when desired. If you ever need to increase the defaults for non-attack XML payload, please file a bug report with libexpat. Bug fixes: #332 #470 For (non-default) compilation with -DEXPAT_MIN_SIZE=ON (CMake) or CPPFLAGS=-DXML_MIN_SIZE (GNU Autotools): Fix segfault for UTF-16 payloads containing CDATA sections. #485 #486 Autotools: Fix generated CMake files for non-64bit and non-Linux platforms (e.g. macOS and MinGW in particular) that were introduced with release 2.3.0 Other changes: #468 #469 xmlwf: Improve help output and the xmlwf man page #463 xmlwf: Improve maintainability through some refactoring #477 xmlwf: Fix man page DocBook validity #458 #459 CMake: Support absolute paths for both CMAKE_INSTALL_LIBDIR and CMAKE_INSTALL_INCLUDEDIR #471 #481 CMake: Add support for standard variable BUILD_SHARED_LIBS #457 Unexpose symbol _INTERNAL_trim_to_complete_utf8_characters #467 Resolve macro HAVE_EXPAT_CONFIG_H #472 Delete unused legacy helper file "conftools/PrintPath" #473 #483 Improve attribution #464 #465 #477 doc/reference.html: Fix XHTML validity #475 #478 doc/reference.html: Replace the 90s look by OK.css #479 Version info bumped from 8:0:7 to 9:0:8 due to addition of new symbols and error codes; see https://verbump.de/ for what these numbers do Infrastructure: #456 CI: Enable periodic runs #457 CI: Start covering the list of exported symbols #474 CI: Isolate coverage task #476 #482 CI: Adapt to breaking changes in image "ubuntu-18.04" #477 CI: Cover well-formedness and DocBook/XHTML validity of doc/reference.html and doc/xmlwf.xml Special thanks to: Dimitry Andric Eero Helenius Nick Wellnhofer Rhodri James Tomas Korbar Yury Gribov and Clang LeakSan JetBrains OSS-Fuzz Release 2.3.0 Thu March 25 2021 Bug fixes: #438 When calling XML_ParseBuffer without a prior successful call to XML_GetBuffer as a user, no longer trigger undefined behavior (by adding an integer to a NULL pointer) but rather return XML_STATUS_ERROR and set the error code to (new) code XML_ERROR_NO_BUFFER. Found by UBSan (UndefinedBehaviorSanitizer) of Clang 11 (but not Clang 9). #444 xmlwf: Exit status 2 was used for both: - malformed input files (documented) and - invalid command-line arguments (undocumented). The case of invalid command-line arguments now has its own exit status 4, resolving the ambiguity. Other changes: #439 xmlwf: Add argument -k to allow continuing after non-fatal errors #439 xmlwf: Add section about exit status to the -h help output #422 #426 #447 Windows: Drop support for Visual Studio <=14.0/2015 #434 Windows: CMake: Detect unsupported Visual Studio at configure time (rather than at compile time) #382 #428 testrunner: Make verbose mode (argument "-v") report about passed tests, and make default mode report about failures, as well. #442 CMake: Call "enable_language(CXX)" prior to tinkering with CMAKE_CXX_* variables #448 Document use of libexpat from a CMake-based project #451 Autotools: Install CMake files as generated by CMake 3.19.6 so that users with "find_package(expat [..] CONFIG [..])" are served on distributions that are *not* using the CMake build system inside for libexpat packaging #436 #437 Autotools: Drop obsolescent macro AC_HEADER_STDC #450 #452 Autotools: Resolve use of obsolete macro AC_CONFIG_HEADER #441 Address compiler warnings #443 Version info bumped from 7:12:6 to 8:0:7 due to addition of error code XML_ERROR_NO_BUFFER (see https://verbump.de/ for what these numbers do) Infrastructure: #435 #446 Replace Travis CI by GitHub Actions Special thanks to: Alexander Richardson Oleksandr Popovych Thomas Beutlich Tim Bray and Clang LeakSan, Clang 11 UBSan and the Clang team Release 2.2.10 Sat October 3 2020 Bug fixes: #390 #395 #398 Fix undefined behavior during parsing caused by pointer arithmetic with NULL pointers #404 #405 Fix reading uninitialized variable during parsing #406 xmlwf: Add missing check for malloc NULL return Other changes: #396 Windows: Drop support for Visual Studio <=8.0/2005 #409 Windows: Add missing file "Changes" to the installer to fix compilation with CMake from installed sources #403 xmlwf: Document exit codes in xmlwf manpage and exit with code 3 (rather than code 1) for output errors when used with "-d DIRECTORY" #356 #359 MinGW: Provide declaration of rand_s for mingwrt <5.3.0 #383 #392 Autotools: Use -Werror while configure tests the compiler for supported compile flags to avoid false positives #383 #393 #394 Autotools: Improve handling of user (C|CPP|CXX|LD)FLAGS, e.g. ensure that they have the last word over flags added while running ./configure #360 CMake: Create libexpatw.{dll,so} and expatw.pc (with emphasis on suffix "w") with -DEXPAT_CHAR_TYPE=(ushort|wchar_t) #360 CMake: Detect and deny unsupported build combinations involving -DEXPAT_CHAR_TYPE=(ushort|wchar_t) #360 CMake: Install pre-compiled shipped xmlwf.1 manpage in case of -DEXPAT_BUILD_DOCS=OFF #375 #380 #419 CMake: Fix use of Expat by means of add_subdirectory #407 #408 CMake: Keep expat target name constant at "expat" (i.e. refrain from using the target name to control build artifact filenames) #385 CMake: Fix compilation with -DEXPAT_SHARED_LIBS=OFF for Windows CMake: Expose man page compilation as target "xmlwf-manpage" #413 #414 CMake: Introduce option EXPAT_BUILD_PKGCONFIG to control generation of pkg-config file "expat.pc" #424 CMake: Add minimalistic support for building binary packages with CMake target "package"; based on CPack #366 CMake: Add option -DEXPAT_OSSFUZZ_BUILD=(ON|OFF) with default OFF to build fuzzer code against OSS-Fuzz and related environment variable LIB_FUZZING_ENGINE #354 Fix testsuite for -DEXPAT_DTD=OFF and -DEXPAT_NS=OFF, each #354 #355 .. #356 #412 Address compiler warnings #368 #369 Address pngcheck warnings with doc/*.png images #425 Version info bumped from 7:11:6 to 7:12:6 Special thanks to: asavah Ben Wagner Bhargava Shastry Frank Landgraf Jeffrey Walton Joe Orton Kleber Tarcísio Ma Lin Maciej Sroczy#ski Mohammed Khajapasha Vadim Zeitlin and Cppcheck 2.0 and the Cppcheck team Release 2.2.9 Wed September 25 2019 Other changes: examples: Drop executable bits from elements.c #349 Windows: Change the name of the Windows DLLs from expat*.dll to libexpat*.dll once more (regression from 2.2.8, first fixed in 1.95.3, issue #61 on SourceForge today, was issue #432456 back then); needs a fix due case-insensitive file systems on Windows and the fact that Perl's XML::Parser::Expat compiles into Expat.dll. #347 Windows: Only define _CRT_RAND_S if not defined Version info bumped from 7:10:6 to 7:11:6 Special thanks to: Ben Wagner
Initial revision