diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-43680.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-43680.patch | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-43680.patch b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-43680.patch new file mode 100644 index 000000000..b19647736 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-43680.patch @@ -0,0 +1,109 @@ +From 5290462a7ea1278a8d5c0d5b2860d4e244f997e4 Mon Sep 17 00:00:00 2001 +From: Sebastian Pipping <sebastian@pipping.org> +Date: Tue, 20 Sep 2022 02:44:34 +0200 +Subject: [PATCH 1/3] lib: Fix overeager DTD destruction in + XML_ExternalEntityParserCreate + +--- + lib/xmlparse.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +diff --git a/lib/xmlparse.c b/lib/xmlparse.c +index aacd6e7fc..57bf103cc 100644 +--- a/lib/xmlparse.c ++++ b/lib/xmlparse.c +@@ -1068,6 +1068,14 @@ parserCreate(const XML_Char *encodingName, + parserInit(parser, encodingName); + + if (encodingName && ! parser->m_protocolEncodingName) { ++ if (dtd) { ++ // We need to stop the upcoming call to XML_ParserFree from happily ++ // destroying parser->m_dtd because the DTD is shared with the parent ++ // parser and the only guard that keeps XML_ParserFree from destroying ++ // parser->m_dtd is parser->m_isParamEntity but it will be set to ++ // XML_TRUE only later in XML_ExternalEntityParserCreate (or not at all). ++ parser->m_dtd = NULL; ++ } + XML_ParserFree(parser); + return NULL; + } + +From 43992e4ae25fc3dc0eec0cd3a29313555d56aee2 Mon Sep 17 00:00:00 2001 +From: Sebastian Pipping <sebastian@pipping.org> +Date: Mon, 19 Sep 2022 18:16:15 +0200 +Subject: [PATCH 2/3] tests: Cover overeager DTD destruction in + XML_ExternalEntityParserCreate + +--- + tests/runtests.c | 49 ++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 49 insertions(+) + +diff --git a/tests/runtests.c b/tests/runtests.c +index 245fe9bda..acb744dd4 100644 +--- a/tests/runtests.c ++++ b/tests/runtests.c +@@ -10208,6 +10208,53 @@ START_TEST(test_alloc_long_notation) { + } + END_TEST + ++static int XMLCALL ++external_entity_parser_create_alloc_fail_handler(XML_Parser parser, ++ const XML_Char *context, ++ const XML_Char *base, ++ const XML_Char *systemId, ++ const XML_Char *publicId) { ++ UNUSED_P(base); ++ UNUSED_P(systemId); ++ UNUSED_P(publicId); ++ ++ if (context != NULL) ++ fail("Unexpected non-NULL context"); ++ ++ // The following number intends to fail the upcoming allocation in line ++ // "parser->m_protocolEncodingName = copyString(encodingName, ++ // &(parser->m_mem));" in function parserInit. ++ allocation_count = 3; ++ ++ const XML_Char *const encodingName = XCS("UTF-8"); // needs something non-NULL ++ const XML_Parser ext_parser ++ = XML_ExternalEntityParserCreate(parser, context, encodingName); ++ if (ext_parser != NULL) ++ fail( ++ "Call to XML_ExternalEntityParserCreate was expected to fail out-of-memory"); ++ ++ allocation_count = ALLOC_ALWAYS_SUCCEED; ++ return XML_STATUS_ERROR; ++} ++ ++START_TEST(test_alloc_reset_after_external_entity_parser_create_fail) { ++ const char *const text = "<!DOCTYPE doc SYSTEM 'foo'><doc/>"; ++ ++ XML_SetExternalEntityRefHandler( ++ g_parser, external_entity_parser_create_alloc_fail_handler); ++ XML_SetParamEntityParsing(g_parser, XML_PARAM_ENTITY_PARSING_ALWAYS); ++ ++ if (XML_Parse(g_parser, text, (int)strlen(text), XML_TRUE) ++ != XML_STATUS_ERROR) ++ fail("Call to parse was expected to fail"); ++ ++ if (XML_GetErrorCode(g_parser) != XML_ERROR_EXTERNAL_ENTITY_HANDLING) ++ fail("Call to parse was expected to fail from the external entity handler"); ++ ++ XML_ParserReset(g_parser, NULL); ++} ++END_TEST ++ + static void + nsalloc_setup(void) { + XML_Memory_Handling_Suite memsuite = {duff_allocator, duff_reallocator, free}; +@@ -12401,6 +12448,8 @@ make_suite(void) { + tcase_add_test(tc_alloc, test_alloc_long_public_id); + tcase_add_test(tc_alloc, test_alloc_long_entity_value); + tcase_add_test(tc_alloc, test_alloc_long_notation); ++ tcase_add_test__ifdef_xml_dtd( ++ tc_alloc, test_alloc_reset_after_external_entity_parser_create_fail); + + suite_add_tcase(s, tc_nsalloc); + tcase_add_checked_fixture(tc_nsalloc, nsalloc_setup, nsalloc_teardown); + + |