CSP should only check host (not including path) when performing frame ancestors checks.

This has been explicitly stated in the CSP-3 spec.

1 files changed, 5 insertions, 0 deletions

diff --git a/dom/security/nsCSPParser.cpp b/dom/security/nsCSPParser.cpp
index a662c9cd1..f1b5d8ba7 100644
--- a/dom/security/nsCSPParser.cpp
+++ b/dom/security/nsCSPParser.cpp
@@ -136,6 +136,7 @@ nsCSPParser::nsCSPParser(cspTokens& aTokens,
  , mUnsafeInlineKeywordSrc(nullptr)
  , mChildSrc(nullptr)
  , mFrameSrc(nullptr)
+ , mParsingFrameAncestorsDir(false)
  , mTokens(aTokens)
  , mSelfURI(aSelfURI)
  , mPolicy(nullptr)
@@ -807,6 +808,7 @@ nsCSPParser::sourceExpression()
   if (nsCSPHostSrc *cspHost = hostSource()) {
     // Do not forget to set the parsed scheme.
     cspHost->setScheme(parsedScheme);
+    cspHost->setWithinFrameAncestorsDir(mParsingFrameAncestorsDir);
     return cspHost;
   }
   // Error was reported in hostSource()
@@ -1209,6 +1211,9 @@ nsCSPParser::directive()
   mStrictDynamic = false;
   mUnsafeInlineKeywordSrc = nullptr;
 
+  mParsingFrameAncestorsDir =
+    CSP_IsDirective(mCurDir[0], nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE);
+
   // Try to parse all the srcs by handing the array off to directiveValue
   nsTArray<nsCSPBaseSrc*> srcs;
   directiveValue(srcs);