add testcase for CVE-2024-50602
(cherry picked from commit 18500b9c8879a75ab6029cd51e930a5c513c3fc0)
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backport-CVE-2024-50602-testcase.patch
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89
backport-CVE-2024-50602-testcase.patch
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From b3836ff534c7cc78128fe7b935aad3d4353814ed Mon Sep 17 00:00:00 2001
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From: Sebastian Pipping <sebastian@pipping.org>
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Date: Sun, 20 Oct 2024 23:24:27 +0200
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Subject: [PATCH 3/3] tests: Cover XML_StopParser's new handling of status
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XML_INITIALIZED
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Prior to the fix to XML_StopParser, test test_misc_resumeparser_not_crashing
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would crash with a NULL pointer dereference in function normal_updatePosition.
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This was the AddressSanitizer output:
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> AddressSanitizer:DEADLYSIGNAL
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> =================================================================
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> ==19700==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x5623e07ad85f bp 0x7ffcf40da650 sp 0x7ffcf40da590 T0)
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> ==19700==The signal is caused by a READ memory access.
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> ==19700==Hint: address points to the zero page.
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> #0 0x5623e07ad85f in normal_updatePosition [..]/lib/xmltok_impl.c:1781:13
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> #1 0x5623e07a52ff in initUpdatePosition [..]/lib/xmltok.c:1031:3
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> #2 0x5623e0762760 in XML_ResumeParser [..]/lib/xmlparse.c:2297:3
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> #3 0x5623e074f7c1 in test_misc_resumeparser_not_crashing() misc_tests_cxx.cpp
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> #4 0x5623e074e228 in srunner_run_all ([..]/build_asan_fuzzers/tests/runtests_cxx+0x136228)
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> #5 0x5623e0753d2d in main ([..]/build_asan_fuzzers/tests/runtests_cxx+0x13bd2d)
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> #6 0x7f802a39af79 (/lib64/libc.so.6+0x25f79)
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> #7 0x7f802a39b034 in __libc_start_main (/lib64/libc.so.6+0x26034)
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> #8 0x5623e064f340 in _start ([..]/build_asan_fuzzers/tests/runtests_cxx+0x37340)
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>
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> AddressSanitizer can not provide additional info.
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> SUMMARY: AddressSanitizer: SEGV [..]/lib/xmltok_impl.c:1781:13 in normal_updatePosition
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> ==19700==ABORTING
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And this the UndefinedBehaviorSanitizer output:
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> [..]/lib/xmltok_impl.c:1781:13: runtime error: load of null pointer of type 'const char'
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> SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior [..]/lib/xmltok_impl.c:1781:13 in
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---
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tests/runtests.c | 31 +++++++++++++++++++++++++++++++
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1 file changed, 31 insertions(+)
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diff --git a/tests/runtests.c b/tests/runtests.c
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index 4649359..2c88c7f 100644
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--- a/tests/runtests.c
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+++ b/tests/runtests.c
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@@ -8207,6 +8207,35 @@ START_TEST(test_misc_tag_mismatch_reset_leak) {
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}
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END_TEST
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+START_TEST(test_misc_resumeparser_not_crashing) {
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+ XML_Parser parser = XML_ParserCreate(NULL);
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+ XML_GetBuffer(parser, 1);
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+ XML_StopParser(parser, /*resumable=*/XML_TRUE);
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+ XML_ResumeParser(parser); // could crash here, previously
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+ XML_ParserFree(parser);
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+}
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+END_TEST
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+
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+START_TEST(test_misc_stopparser_rejects_unstarted_parser) {
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+ const XML_Bool cases[] = {XML_TRUE, XML_FALSE};
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+ for (size_t i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
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+ const XML_Bool resumable = cases[i];
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+ XML_Parser parser = XML_ParserCreate(NULL);
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+
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+ if (XML_GetErrorCode(parser) != XML_ERROR_NONE)
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+ fail("There was not supposed to be any initial parse error.");
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+
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+ if (XML_StopParser(parser, resumable) != XML_STATUS_ERROR)
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+ fail("Attempting to suspend a subordinate parser not faulted.");
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+
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+ if (XML_GetErrorCode(parser) != XML_ERROR_NOT_STARTED)
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+ fail("parser not started.");
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+ XML_ParserFree(parser);
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+ }
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+}
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+END_TEST
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+
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+
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static void
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alloc_setup(void) {
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XML_Memory_Handling_Suite memsuite = {duff_allocator, duff_reallocator, free};
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@@ -12707,6 +12736,8 @@ make_suite(void) {
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tcase_add_test__ifdef_xml_dtd(
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tc_misc, test_misc_deny_internal_entity_closing_doctype_issue_317);
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tcase_add_test(tc_misc, test_misc_tag_mismatch_reset_leak);
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+ tcase_add_test(tc_misc, test_misc_resumeparser_not_crashing);
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+ tcase_add_test(tc_misc, test_misc_stopparser_rejects_unstarted_parser);
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suite_add_tcase(s, tc_alloc);
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tcase_add_checked_fixture(tc_alloc, alloc_setup, alloc_teardown);
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--
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2.27.0
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@ -1,7 +1,7 @@
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%define Rversion %(echo %{version} | sed -e 's/\\./_/g' -e 's/^/R_/')
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Name: expat
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Version: 2.5.0
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Release: 6
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Release: 7
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Summary: An XML parser library
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License: MIT
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URL: https://libexpat.github.io/
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@ -30,6 +30,7 @@ Patch20: backport-003-CVE-2024-45490.patch
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Patch21: backport-CVE-2024-45491.patch
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Patch22: backport-CVE-2024-45492.patch
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Patch23: backport-CVE-2024-50602.patch
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Patch24: backport-CVE-2024-50602-testcase.patch
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BuildRequires: sed,autoconf,automake,gcc-c++,libtool,xmlto
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@ -78,6 +79,9 @@ find %{buildroot} -type f -name changelog -delete
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%{_mandir}/man1/*
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%changelog
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* Tue Oct 29 2024 liningjie <liningjie@xfusion.com> - 2.5.0-7
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- add testcase for CVE-2024-50602
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* Tue Oct 29 2024 liningjie <liningjie@xfusion.com> - 2.5.0-6
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- fix CVE-2024-50602
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