From 5c0dc2a21e6ab1da9ea3943050793a52c742e539 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Wed, 19 Jun 2019 20:54:29 +0300 Subject: libxslt: Fix CVE-2019-11068 Signed-off-by: Adrian Bunk Signed-off-by: Richard Purdie --- .../files/0001-Fix-security-framework-bypass.patch | 124 +++++++++++++++++++++ meta/recipes-support/libxslt/libxslt_1.1.33.bb | 4 +- 2 files changed, 127 insertions(+), 1 deletion(-) create mode 100644 meta/recipes-support/libxslt/files/0001-Fix-security-framework-bypass.patch diff --git a/meta/recipes-support/libxslt/files/0001-Fix-security-framework-bypass.patch b/meta/recipes-support/libxslt/files/0001-Fix-security-framework-bypass.patch new file mode 100644 index 0000000000..89b647ddbf --- /dev/null +++ b/meta/recipes-support/libxslt/files/0001-Fix-security-framework-bypass.patch @@ -0,0 +1,124 @@ +From e03553605b45c88f0b4b2980adfbbb8f6fca2fd6 Mon Sep 17 00:00:00 2001 +From: Nick Wellnhofer +Date: Sun, 24 Mar 2019 09:51:39 +0100 +Subject: 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. + +Signed-off-by: Adrian Bunk +Upstream-Status: Backport +CVE: CVE-2019-11068 +--- + 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); + } + } +-- +2.20.1 + diff --git a/meta/recipes-support/libxslt/libxslt_1.1.33.bb b/meta/recipes-support/libxslt/libxslt_1.1.33.bb index 462eccf52f..6320a821dc 100644 --- a/meta/recipes-support/libxslt/libxslt_1.1.33.bb +++ b/meta/recipes-support/libxslt/libxslt_1.1.33.bb @@ -8,7 +8,9 @@ LIC_FILES_CHKSUM = "file://Copyright;md5=0cd9a07afbeb24026c9b03aecfeba458" SECTION = "libs" DEPENDS = "libxml2" -SRC_URI = "http://xmlsoft.org/sources/libxslt-${PV}.tar.gz" +SRC_URI = "http://xmlsoft.org/sources/libxslt-${PV}.tar.gz \ + file://0001-Fix-security-framework-bypass.patch \ +" SRC_URI[md5sum] = "b3bd254a03e46d58f8ad1e4559cd2c2f" SRC_URI[sha256sum] = "8e36605144409df979cab43d835002f63988f3dc94d5d3537c12796db90e38c8" -- cgit 1.2.3-korg