diff options
Diffstat (limited to 'meta/recipes-core/libxml/libxml2/CVE-2021-3537.patch')
| -rw-r--r-- | meta/recipes-core/libxml/libxml2/CVE-2021-3537.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/meta/recipes-core/libxml/libxml2/CVE-2021-3537.patch b/meta/recipes-core/libxml/libxml2/CVE-2021-3537.patch new file mode 100644 index 0000000000..defbe7867b --- /dev/null +++ b/meta/recipes-core/libxml/libxml2/CVE-2021-3537.patch @@ -0,0 +1,49 @@ +From 5ae9c39401f679648301efa6d2d35e09cc376462 Mon Sep 17 00:00:00 2001 +From: Nick Wellnhofer <wellnhofer@aevum.de> +Date: Sat, 1 May 2021 16:53:33 +0200 +Subject: [PATCH 3/3] Propagate error in xmlParseElementChildrenContentDeclPriv + +Check return value of recursive calls to +xmlParseElementChildrenContentDeclPriv and return immediately in case +of errors. Otherwise, struct xmlElementContent could contain unexpected +null pointers, leading to a null deref when post-validating documents +which aren't well-formed and parsed in recovery mode. + +Fixes #243. + +CVE: CVE-2021-3537 +Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libxml2/-/commit/babe75030c7f64a37826bb3342317134568bef61] + +Signed-off-by: Tony Tascioglu <tony.tascioglu@windriver.com> +--- + parser.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +diff --git a/parser.c b/parser.c +index a34bb6cd..bbcff39f 100644 +--- a/parser.c ++++ b/parser.c +@@ -6195,6 +6195,8 @@ xmlParseElementChildrenContentDeclPriv(xmlParserCtxtPtr ctxt, int inputchk, + SKIP_BLANKS; + cur = ret = xmlParseElementChildrenContentDeclPriv(ctxt, inputid, + depth + 1); ++ if (cur == NULL) ++ return(NULL); + SKIP_BLANKS; + GROW; + } else { +@@ -6328,6 +6330,11 @@ xmlParseElementChildrenContentDeclPriv(xmlParserCtxtPtr ctxt, int inputchk, + SKIP_BLANKS; + last = xmlParseElementChildrenContentDeclPriv(ctxt, inputid, + depth + 1); ++ if (last == NULL) { ++ if (ret != NULL) ++ xmlFreeDocElementContent(ctxt->myDoc, ret); ++ return(NULL); ++ } + SKIP_BLANKS; + } else { + elem = xmlParseName(ctxt); +-- +2.25.1 + |