Message ID | 20200217121626.31154-1-patrickdepinguin@gmail.com |
---|---|
State | Changes Requested |
Headers | show |
Series | package/libxml2: add upstream security fix for CVE-2019-20388 | expand |
Hello, On Mon, 17 Feb 2020 13:16:25 +0100 Thomas De Schampheleire <patrickdepinguin@gmail.com> wrote: > From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> > > Fixes CVE-2019-20388: xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 > allows an xmlSchemaValidateStream memory leak. > > Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> > --- > ...mory-leak-in-xmlSchemaValidateStream.patch | 33 +++++++++++++++++++ > 1 file changed, 33 insertions(+) > create mode 100644 package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > > diff --git a/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > new file mode 100644 > index 0000000000..49ff6fbe00 > --- /dev/null > +++ b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > @@ -0,0 +1,33 @@ > +From 7ffcd44d7e6c46704f8af0321d9314cd26e0e18a Mon Sep 17 00:00:00 2001 > +From: Zhipeng Xie <xiezhipeng1@huawei.com> > +Date: Tue, 20 Aug 2019 16:33:06 +0800 > +Subject: [PATCH] Fix memory leak in xmlSchemaValidateStream > + > +When ctxt->schema is NULL, xmlSchemaSAXPlug->xmlSchemaPreRun > +alloc a new schema for ctxt->schema and set vctxt->xsiAssemble > +to 1. Then xmlSchemaVStart->xmlSchemaPreRun initialize > +vctxt->xsiAssemble to 0 again which cause the alloced schema > +can not be freed anymore. > + > +Found with libFuzzer. > + > +Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> Thanks Thomas for sending security patches! :-) We request patches to have a SoB line from the person submitting them. Could you add your SoB here ? Thanks! Thomas
El lun., 17 feb. 2020 a las 20:39, Thomas Petazzoni (<thomas.petazzoni@bootlin.com>) escribió: > > Hello, > > On Mon, 17 Feb 2020 13:16:25 +0100 > Thomas De Schampheleire <patrickdepinguin@gmail.com> wrote: > > > From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> > > > > Fixes CVE-2019-20388: xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 > > allows an xmlSchemaValidateStream memory leak. > > > > Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> > > --- > > ...mory-leak-in-xmlSchemaValidateStream.patch | 33 +++++++++++++++++++ > > 1 file changed, 33 insertions(+) > > create mode 100644 package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > > > > diff --git a/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > > new file mode 100644 > > index 0000000000..49ff6fbe00 > > --- /dev/null > > +++ b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch > > @@ -0,0 +1,33 @@ > > +From 7ffcd44d7e6c46704f8af0321d9314cd26e0e18a Mon Sep 17 00:00:00 2001 > > +From: Zhipeng Xie <xiezhipeng1@huawei.com> > > +Date: Tue, 20 Aug 2019 16:33:06 +0800 > > +Subject: [PATCH] Fix memory leak in xmlSchemaValidateStream > > + > > +When ctxt->schema is NULL, xmlSchemaSAXPlug->xmlSchemaPreRun > > +alloc a new schema for ctxt->schema and set vctxt->xsiAssemble > > +to 1. Then xmlSchemaVStart->xmlSchemaPreRun initialize > > +vctxt->xsiAssemble to 0 again which cause the alloced schema > > +can not be freed anymore. > > + > > +Found with libFuzzer. > > + > > +Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> > > Thanks Thomas for sending security patches! :-) :-) > > We request patches to have a SoB line from the person submitting them. > Could you add your SoB here ? > Sorry, v2 coming up...
diff --git a/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch new file mode 100644 index 0000000000..49ff6fbe00 --- /dev/null +++ b/package/libxml2/0002-Fix-memory-leak-in-xmlSchemaValidateStream.patch @@ -0,0 +1,33 @@ +From 7ffcd44d7e6c46704f8af0321d9314cd26e0e18a Mon Sep 17 00:00:00 2001 +From: Zhipeng Xie <xiezhipeng1@huawei.com> +Date: Tue, 20 Aug 2019 16:33:06 +0800 +Subject: [PATCH] Fix memory leak in xmlSchemaValidateStream + +When ctxt->schema is NULL, xmlSchemaSAXPlug->xmlSchemaPreRun +alloc a new schema for ctxt->schema and set vctxt->xsiAssemble +to 1. Then xmlSchemaVStart->xmlSchemaPreRun initialize +vctxt->xsiAssemble to 0 again which cause the alloced schema +can not be freed anymore. + +Found with libFuzzer. + +Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> +--- + xmlschemas.c | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/xmlschemas.c b/xmlschemas.c +index 301c8449..39d92182 100644 +--- a/xmlschemas.c ++++ b/xmlschemas.c +@@ -28090,7 +28090,6 @@ xmlSchemaPreRun(xmlSchemaValidCtxtPtr vctxt) { + vctxt->nberrors = 0; + vctxt->depth = -1; + vctxt->skipDepth = -1; +- vctxt->xsiAssemble = 0; + vctxt->hasKeyrefs = 0; + #ifdef ENABLE_IDC_NODE_TABLES_TEST + vctxt->createIDCNodeTables = 1; +-- +2.24.1 +