From: "Maxin B. John" <maxin.j...@enea.com> It was discovered that libxml2, a library providing support to read, modify and write XML files, incorrectly performs entity substituton in the doctype prolog, even if the application using libxml2 disabled any entity substitution. A remote attacker could provide a specially-crafted XML file that, when processed, would lead to the exhaustion of CPU and memory resources or file descriptors.
Reference: https://access.redhat.com/security/cve/CVE-2014-0191 Signed-off-by: Maxin B. John <maxin.j...@enea.com> --- meta/recipes-core/libxml/libxml2.inc | 1 + .../libxml/libxml2/libxml2-CVE-2014-0191-fix.patch | 37 ++++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100644 meta/recipes-core/libxml/libxml2/libxml2-CVE-2014-0191-fix.patch diff --git a/meta/recipes-core/libxml/libxml2.inc b/meta/recipes-core/libxml/libxml2.inc index 7fb2644..60bb6b8 100644 --- a/meta/recipes-core/libxml/libxml2.inc +++ b/meta/recipes-core/libxml/libxml2.inc @@ -18,6 +18,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \ file://ansidecl.patch \ file://runtest.patch \ file://run-ptest \ + file://libxml2-CVE-2014-0191-fix.patch \ " inherit autotools pkgconfig binconfig pythonnative ptest diff --git a/meta/recipes-core/libxml/libxml2/libxml2-CVE-2014-0191-fix.patch b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2014-0191-fix.patch new file mode 100644 index 0000000..1c05ae6 --- /dev/null +++ b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2014-0191-fix.patch @@ -0,0 +1,37 @@ +From: Daniel Veillard <veill...@redhat.com> +Date: Tue, 22 Apr 2014 15:30:56 +0800 +Subject: Do not fetch external parameter entities + +Unless explicitely asked for when validating or replacing entities +with their value. Problem pointed out by Daniel Berrange <berra...@redhat.com> + +Upstream-Status: Backport +Reference: https://access.redhat.com/security/cve/CVE-2014-0191 + +Signed-off-by: Daniel Veillard <veill...@redhat.com> +Signed-off-by: Maxin B. John <maxin.j...@enea.com> +--- +diff -Naur libxml2-2.9.1-orig/parser.c libxml2-2.9.1/parser.c +--- libxml2-2.9.1-orig/parser.c 2013-04-16 15:39:18.000000000 +0200 ++++ libxml2-2.9.1/parser.c 2014-05-07 13:35:46.883687946 +0200 +@@ -2595,6 +2595,20 @@ + xmlCharEncoding enc; + + /* ++ * Note: external parsed entities will not be loaded, it is ++ * not required for a non-validating parser, unless the ++ * option of validating, or substituting entities were ++ * given. Doing so is far more secure as the parser will ++ * only process data coming from the document entity by ++ * default. ++ */ ++ if ((entity->etype == XML_EXTERNAL_PARAMETER_ENTITY) && ++ ((ctxt->options & XML_PARSE_NOENT) == 0) && ++ ((ctxt->options & XML_PARSE_DTDVALID) == 0) && ++ (ctxt->validate == 0)) ++ return; ++ ++ /* + * handle the extra spaces added before and after + * c.f. http://www.w3.org/TR/REC-xml#as-PE + * this is done independently. -- 1.7.10.4 -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
