vanhofen
3 years ago
3 changed files with 1 additions and 72 deletions
@ -1,36 +0,0 @@ |
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From 0e1a49c8907645d2e155f0d89d4d9895ac5112b5 Mon Sep 17 00:00:00 2001 |
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From: Zhipeng Xie <xiezhipeng1@huawei.com> |
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Date: Thu, 12 Dec 2019 17:30:55 +0800 |
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Subject: [PATCH] Fix infinite loop in xmlStringLenDecodeEntities |
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When ctxt->instate == XML_PARSER_EOF,xmlParseStringEntityRef |
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return NULL which cause a infinite loop in xmlStringLenDecodeEntities |
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Found with libFuzzer. |
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Fixes CVE-2020-7595: xmlStringLenDecodeEntities in parser.c in libxml2 |
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2.9.10 has an infinite loop in a certain end-of-file situation. |
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Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> |
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Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
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---
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parser.c | 3 ++- |
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1 file changed, 2 insertions(+), 1 deletion(-) |
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diff --git a/parser.c b/parser.c
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index d1c31963..a34bb6cd 100644
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--- a/parser.c
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+++ b/parser.c
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@@ -2646,7 +2646,8 @@ xmlStringLenDecodeEntities(xmlParserCtxtPtr ctxt, const xmlChar *str, int len,
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else |
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c = 0; |
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while ((c != 0) && (c != end) && /* non input consuming loop */ |
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- (c != end2) && (c != end3)) {
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+ (c != end2) && (c != end3) &&
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+ (ctxt->instate != XML_PARSER_EOF)) {
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if (c == 0) break; |
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if ((c == '&') && (str[1] == '#')) { |
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--
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2.20.1 |
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@ -1,35 +0,0 @@ |
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From 7ffcd44d7e6c46704f8af0321d9314cd26e0e18a Mon Sep 17 00:00:00 2001 |
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From: Zhipeng Xie <xiezhipeng1@huawei.com> |
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Date: Tue, 20 Aug 2019 16:33:06 +0800 |
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Subject: [PATCH] Fix memory leak in xmlSchemaValidateStream |
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When ctxt->schema is NULL, xmlSchemaSAXPlug->xmlSchemaPreRun |
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alloc a new schema for ctxt->schema and set vctxt->xsiAssemble |
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to 1. Then xmlSchemaVStart->xmlSchemaPreRun initialize |
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vctxt->xsiAssemble to 0 again which cause the alloced schema |
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can not be freed anymore. |
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Found with libFuzzer. |
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Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> |
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[import into Buildroot] |
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Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> |
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---
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xmlschemas.c | 1 - |
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1 file changed, 1 deletion(-) |
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diff --git a/xmlschemas.c b/xmlschemas.c
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index 301c8449..39d92182 100644
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--- a/xmlschemas.c
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+++ b/xmlschemas.c
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@@ -28090,7 +28090,6 @@ xmlSchemaPreRun(xmlSchemaValidCtxtPtr vctxt) {
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vctxt->nberrors = 0; |
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vctxt->depth = -1; |
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vctxt->skipDepth = -1; |
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- vctxt->xsiAssemble = 0;
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vctxt->hasKeyrefs = 0; |
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#ifdef ENABLE_IDC_NODE_TABLES_TEST |
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vctxt->createIDCNodeTables = 1; |
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--
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2.24.1 |
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