main/libxslt: security fix for CVE-2019-11068

fixes #10277

2 files changed, 129 insertions, 4 deletions

diff --git a/main/libxslt/APKBUILD b/main/libxslt/APKBUILD
index b7f09aa68e..a8da85328b 100644
--- a/main/libxslt/APKBUILD
+++ b/main/libxslt/APKBUILD
@@ -2,19 +2,23 @@
 # Contributor: Francesco Colista <fcolista@alpinelinux.org>
 pkgname=libxslt
 pkgver=1.1.33
-pkgrel=0
+pkgrel=1
 pkgdesc="XML stylesheet transformation library"
 url="http://xmlsoft.org/XSLT/"
 arch="all"
 license="custom"
 makedepends="libxml2-dev libgcrypt-dev libgpg-error-dev python2-dev"
 subpackages="$pkgname-dev $pkgname-doc py2-$pkgname:py2"
-source="http://xmlsoft.org/sources/$pkgname-$pkgver.tar.gz"
+source="http://xmlsoft.org/sources/$pkgname-$pkgver.tar.gz
+	CVE-2019-11068.patch
+	"
 builddir="$srcdir/$pkgname-$pkgver"
 
 # secfixes:
+#   1.1.33-r1:
+#   - CVE-2019-11068
 #   1.1.29-r1:
-#     - CVE-2017-5029
+#   - CVE-2017-5029
 
 build() {
 	cd "$builddir"
@@ -42,4 +46,5 @@ py2() {
 	mv "$pkgdir"/usr/lib/python* "$subpkgdir"/usr/lib/
 }
 
-sha512sums="ebbe438a38bf6355950167d3b580edc22baa46a77068c18c42445c1c9c716d42bed3b30c5cd5bec359ab32d03843224dae458e9e32dc61693e7cf4bab23536e0  libxslt-1.1.33.tar.gz"
+sha512sums="ebbe438a38bf6355950167d3b580edc22baa46a77068c18c42445c1c9c716d42bed3b30c5cd5bec359ab32d03843224dae458e9e32dc61693e7cf4bab23536e0  libxslt-1.1.33.tar.gz
+9a97c5038809aaf64cb4eb7d67b95acc4b62236d7613a5f753e2a0f4c9e707c22cd07bda2e518d3f36a40b9ed5aa93496b743998c7adadb84ca147e045e35948  CVE-2019-11068.patch"
diff --git a/main/libxslt/CVE-2019-11068.patch b/main/libxslt/CVE-2019-11068.patch
new file mode 100644
index 0000000000..260f35d1a3
--- /dev/null
+++ b/main/libxslt/CVE-2019-11068.patch
@@ -0,0 +1,120 @@
+From e03553605b45c88f0b4b2980adfbbb8f6fca2fd6 Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Sun, 24 Mar 2019 09:51:39 +0100
+Subject: [PATCH] Fix security framework bypass
+
+xsltCheckRead and xsltCheckWrite return -1 in case of error but callers
+don't check for this condition and allow access. With a specially
+crafted URL, xsltCheckRead could be tricked into returning an error
+because of a supposedly invalid URL that would still be loaded
+succesfully later on.
+
+Fixes #12.
+
+Thanks to Felix Wilhelm for the report.
+---
+ libxslt/documents.c | 18 ++++++++++--------
+ libxslt/imports.c   |  9 +++++----
+ libxslt/transform.c |  9 +++++----
+ libxslt/xslt.c      |  9 +++++----
+ 4 files changed, 25 insertions(+), 20 deletions(-)
+
+diff --git a/libxslt/documents.c b/libxslt/documents.c
+index 3f3a7312..4aad11bb 100644
+--- a/libxslt/documents.c
++++ b/libxslt/documents.c
+@@ -296,10 +296,11 @@ xsltLoadDocument(xsltTransformContextPtr ctxt, const xmlChar *URI) {
+ 	int res;
+ 
+ 	res = xsltCheckRead(ctxt->sec, ctxt, URI);
+-	if (res == 0) {
+-	    xsltTransformError(ctxt, NULL, NULL,
+-		 "xsltLoadDocument: read rights for %s denied\n",
+-			     URI);
++	if (res <= 0) {
++            if (res == 0)
++                xsltTransformError(ctxt, NULL, NULL,
++                     "xsltLoadDocument: read rights for %s denied\n",
++                                 URI);
+ 	    return(NULL);
+ 	}
+     }
+@@ -372,10 +373,11 @@ xsltLoadStyleDocument(xsltStylesheetPtr style, const xmlChar *URI) {
+ 	int res;
+ 
+ 	res = xsltCheckRead(sec, NULL, URI);
+-	if (res == 0) {
+-	    xsltTransformError(NULL, NULL, NULL,
+-		 "xsltLoadStyleDocument: read rights for %s denied\n",
+-			     URI);
++	if (res <= 0) {
++            if (res == 0)
++                xsltTransformError(NULL, NULL, NULL,
++                     "xsltLoadStyleDocument: read rights for %s denied\n",
++                                 URI);
+ 	    return(NULL);
+ 	}
+     }
+diff --git a/libxslt/imports.c b/libxslt/imports.c
+index 874870cc..3783b247 100644
+--- a/libxslt/imports.c
++++ b/libxslt/imports.c
+@@ -130,10 +130,11 @@ xsltParseStylesheetImport(xsltStylesheetPtr style, xmlNodePtr cur) {
+ 	int secres;
+ 
+ 	secres = xsltCheckRead(sec, NULL, URI);
+-	if (secres == 0) {
+-	    xsltTransformError(NULL, NULL, NULL,
+-		 "xsl:import: read rights for %s denied\n",
+-			     URI);
++	if (secres <= 0) {
++            if (secres == 0)
++                xsltTransformError(NULL, NULL, NULL,
++                     "xsl:import: read rights for %s denied\n",
++                                 URI);
+ 	    goto error;
+ 	}
+     }
+diff --git a/libxslt/transform.c b/libxslt/transform.c
+index 13793914..0636dbd0 100644
+--- a/libxslt/transform.c
++++ b/libxslt/transform.c
+@@ -3493,10 +3493,11 @@ xsltDocumentElem(xsltTransformContextPtr ctxt, xmlNodePtr node,
+      */
+     if (ctxt->sec != NULL) {
+ 	ret = xsltCheckWrite(ctxt->sec, ctxt, filename);
+-	if (ret == 0) {
+-	    xsltTransformError(ctxt, NULL, inst,
+-		 "xsltDocumentElem: write rights for %s denied\n",
+-			     filename);
++	if (ret <= 0) {
++            if (ret == 0)
++                xsltTransformError(ctxt, NULL, inst,
++                     "xsltDocumentElem: write rights for %s denied\n",
++                                 filename);
+ 	    xmlFree(URL);
+ 	    xmlFree(filename);
+ 	    return;
+diff --git a/libxslt/xslt.c b/libxslt/xslt.c
+index 780a5ad7..a234eb79 100644
+--- a/libxslt/xslt.c
++++ b/libxslt/xslt.c
+@@ -6763,10 +6763,11 @@ xsltParseStylesheetFile(const xmlChar* filename) {
+ 	int res;
+ 
+ 	res = xsltCheckRead(sec, NULL, filename);
+-	if (res == 0) {
+-	    xsltTransformError(NULL, NULL, NULL,
+-		 "xsltParseStylesheetFile: read rights for %s denied\n",
+-			     filename);
++	if (res <= 0) {
++            if (res == 0)
++                xsltTransformError(NULL, NULL, NULL,
++                     "xsltParseStylesheetFile: read rights for %s denied\n",
++                                 filename);
+ 	    return(NULL);
+ 	}
+     }
+-- 
+2.18.1
+