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Bug 693940: Restrict SVG-as-an-image to load URIs with URI_INHERITS_SECURITY_CONTEXT. r=bz

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This commit is contained in:
Daniel Holbert 2011-11-07 13:45:42 -08:00
parent 229a594529
commit 038d6caf4d
2 changed files with 9 additions and 7 deletions
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12
content/base/src/nsDataDocumentContentPolicy.cpp
View File

@ -87,12 +87,14 @@ nsDataDocumentContentPolicy::ShouldLoad(PRUint32 aContentType,
}
if (doc->IsBeingUsedAsImage()) {
// Allow local resources for SVG-as-an-image documents, but disallow
// everything else, to prevent data leakage
// Only allow SVG-as-an-image to load local resources that inherit security
// context (basically just data: URIs), to prevent data leakage.
bool hasFlags;
nsresult rv = NS_URIChainHasFlags(aContentLocation,
nsIProtocolHandler::URI_IS_LOCAL_RESOURCE,
&hasFlags);
nsresult rv =
NS_URIChainHasFlags(aContentLocation,
nsIProtocolHandler::URI_IS_LOCAL_RESOURCE |
nsIProtocolHandler::URI_INHERITS_SECURITY_CONTEXT,
&hasFlags);
if (NS_FAILED(rv) || !hasFlags) {
// resource is not local (or we couldn't tell) - reject!
*aDecision = nsIContentPolicy::REJECT_TYPE;

4
layout/reftests/svg/as-image/reftest.list
View File

@ -109,11 +109,11 @@ random == img-and-image-1.html img-and-image-1-ref.svg # bug 645267
# tests for external resources vs. data URIs in SVG as an image
== svg-image-datauri-1.html lime100x100.svg
HTTP == svg-image-datauri-1.html lime100x100.svg
fails-if(Android) == svg-image-external-1.html lime100x100.svg
== svg-image-external-1.html blue100x100.svg
HTTP == svg-image-external-1.html blue100x100.svg
== svg-stylesheet-datauri-1.html lime100x100.svg
HTTP == svg-stylesheet-datauri-1.html lime100x100.svg
random == svg-stylesheet-external-1.html lime100x100.svg # see bug 629885 comment 9
== svg-stylesheet-external-1.html blue100x100.svg
HTTP == svg-stylesheet-external-1.html blue100x100.svg
# test that :visited status is ignored in image documents