libxslt: backport patch for CVE-2019-11068

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

diff --git a/libs/libxslt/Makefile b/libs/libxslt/Makefile
index 8c546c831452bf7b53ff01d980485e623b4d0209..aa292b7dd8d035b107b5c267060c7cfbb68f2795 100644 (file)
--- a/libs/libxslt/Makefile
+++ b/libs/libxslt/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libxslt
 PKG_VERSION:=1.1.32
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:= \

diff --git a/libs/libxslt/patches/100-fix-cve-2019-11068.patch b/libs/libxslt/patches/100-fix-cve-2019-11068.patch
new file mode 100644 (file)
index 0000000..b7ff482
--- /dev/null
+++ b/libs/libxslt/patches/100-fix-cve-2019-11068.patch
@@ -0,0 +1,109 @@
+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(-)
+
+--- a/libxslt/documents.c
++++ b/libxslt/documents.c
+@@ -296,10 +296,11 @@ xsltLoadDocument(xsltTransformContextPtr
+       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
+       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);
+       }
+     }
+--- a/libxslt/imports.c
++++ b/libxslt/imports.c
+@@ -131,10 +131,11 @@ xsltParseStylesheetImport(xsltStylesheet
+       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;
+       }
+     }
+--- a/libxslt/transform.c
++++ b/libxslt/transform.c
+@@ -3485,10 +3485,11 @@ xsltDocumentElem(xsltTransformContextPtr
+      */
+     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;
+--- a/libxslt/xslt.c
++++ b/libxslt/xslt.c
+@@ -6763,10 +6763,11 @@ xsltParseStylesheetFile(const xmlChar* f
+       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);
+       }
+     }