diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-core/expat/expat')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_1.patch | 49 | ||||
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_2.patch | 104 |
2 files changed, 153 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_1.patch b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_1.patch new file mode 100644 index 000000000..80ddcb4f2 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_1.patch @@ -0,0 +1,49 @@ +From 4a32da87e931ba54393d465bb77c40b5c33d343b Mon Sep 17 00:00:00 2001 +From: Rhodri James <rhodri@wildebeest.org.uk> +Date: Wed, 17 Aug 2022 18:26:18 +0100 +Subject: [PATCH] Ensure raw tagnames are safe exiting internalEntityParser + +It is possible to concoct a situation in which parsing is +suspended while substituting in an internal entity, so that +XML_ResumeParser directly uses internalEntityProcessor as +its processor. If the subsequent parse includes some unclosed +tags, this will return without calling storeRawNames to ensure +that the raw versions of the tag names are stored in memory other +than the parse buffer itself. If the parse buffer is then changed +or reallocated (for example if processing a file line by line), +badness will ensue. + +This patch ensures storeRawNames is always called when needed +after calling doContent. The earlier call do doContent does +not need the same protection; it only deals with entity +substitution, which cannot leave unbalanced tags, and in any +case the raw names will be pointing into the stored entity +value not the parse buffer. +--- + lib/xmlparse.c | 13 +++++++++---- + 1 file changed, 9 insertions(+), 4 deletions(-) + +diff --git a/lib/xmlparse.c b/lib/xmlparse.c +index 7bcabf7f4..d73f419cf 100644 +--- a/lib/xmlparse.c ++++ b/lib/xmlparse.c +@@ -5826,10 +5826,15 @@ internalEntityProcessor(XML_Parser parser, const char *s, const char *end, + { + parser->m_processor = contentProcessor; + /* see externalEntityContentProcessor vs contentProcessor */ +- return doContent(parser, parser->m_parentParser ? 1 : 0, parser->m_encoding, +- s, end, nextPtr, +- (XML_Bool)! parser->m_parsingStatus.finalBuffer, +- XML_ACCOUNT_DIRECT); ++ result = doContent(parser, parser->m_parentParser ? 1 : 0, ++ parser->m_encoding, s, end, nextPtr, ++ (XML_Bool)! parser->m_parsingStatus.finalBuffer, ++ XML_ACCOUNT_DIRECT); ++ if (result == XML_ERROR_NONE) { ++ if (! storeRawNames(parser)) ++ return XML_ERROR_NO_MEMORY; ++ } ++ return result; + } + } + diff --git a/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_2.patch b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_2.patch new file mode 100644 index 000000000..affd97faf --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-core/expat/expat/CVE-2022-40674_2.patch @@ -0,0 +1,104 @@ +From a7ce80a013f2a08cb1ac4aac368f2250eea03ebf Mon Sep 17 00:00:00 2001 +From: Sebastian Pipping <sebastian@pipping.org> +Date: Sun, 11 Sep 2022 19:34:33 +0200 +Subject: [PATCH 1/2] tests: Cover heap use-after-free issue in doContent + +--- + tests/runtests.c | 74 ++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 74 insertions(+) + +diff --git a/tests/runtests.c b/tests/runtests.c +index ea371b42f..ab3aff65b 100644 +--- a/tests/runtests.c ++++ b/tests/runtests.c +@@ -4990,6 +4990,78 @@ START_TEST(test_suspend_resume_internal_entity) { + } + END_TEST + ++void ++suspending_comment_handler(void *userData, const XML_Char *data) { ++ UNUSED_P(data); ++ XML_Parser parser = (XML_Parser)userData; ++ XML_StopParser(parser, XML_TRUE); ++} ++ ++START_TEST(test_suspend_resume_internal_entity_issue_629) { ++ const char *const text ++ = "<!DOCTYPE a [<!ENTITY e '<!--COMMENT-->a'>]><a>&e;<b>\n" ++ "<" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ++ "/>" ++ "</b></a>"; ++ const size_t firstChunkSizeBytes = 54; ++ ++ XML_Parser parser = XML_ParserCreate(NULL); ++ XML_SetUserData(parser, parser); ++ XML_SetCommentHandler(parser, suspending_comment_handler); ++ ++ if (XML_Parse(parser, text, (int)firstChunkSizeBytes, XML_FALSE) ++ != XML_STATUS_SUSPENDED) ++ xml_failure(parser); ++ if (XML_ResumeParser(parser) != XML_STATUS_OK) ++ xml_failure(parser); ++ if (XML_Parse(parser, text + firstChunkSizeBytes, ++ (int)(strlen(text) - firstChunkSizeBytes), XML_TRUE) ++ != XML_STATUS_OK) ++ xml_failure(parser); ++ XML_ParserFree(parser); ++} ++END_TEST ++ + /* Test syntax error is caught at parse resumption */ + START_TEST(test_resume_entity_with_syntax_error) { + const char *text = "<!DOCTYPE doc [\n" +@@ -12016,6 +12088,8 @@ make_suite(void) { + tcase_add_test(tc_basic, test_partial_char_in_epilog); + tcase_add_test(tc_basic, test_hash_collision); + tcase_add_test__ifdef_xml_dtd(tc_basic, test_suspend_resume_internal_entity); ++ tcase_add_test__ifdef_xml_dtd(tc_basic, ++ test_suspend_resume_internal_entity_issue_629); + tcase_add_test__ifdef_xml_dtd(tc_basic, test_resume_entity_with_syntax_error); + tcase_add_test__ifdef_xml_dtd(tc_basic, test_suspend_resume_parameter_entity); + tcase_add_test(tc_basic, test_restart_on_error); + + + |