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[tor-commits] [tor-browser/tor-browser-84.0.2-10.0-1] Bug 30541: Disable WebGL readPixel() for web content
commit 9dfe1278c4de6d8ea6d3d9f8c42dad3023c3f8d7
Author: Georg Koppen <gk@xxxxxxxxxxxxxx>
Date: Wed May 29 12:29:19 2019 +0000
Bug 30541: Disable WebGL readPixel() for web content
---
dom/canvas/ClientWebGLContext.cpp | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/dom/canvas/ClientWebGLContext.cpp b/dom/canvas/ClientWebGLContext.cpp
index 8a5e58e22d7a..8edd94336863 100644
--- a/dom/canvas/ClientWebGLContext.cpp
+++ b/dom/canvas/ClientWebGLContext.cpp
@@ -4615,6 +4615,14 @@ bool ClientWebGLContext::ReadPixels_SharedPrecheck(
return false;
}
+ // Security check passed, but don't let content readPixel calls through for
+ // now, if Resist Fingerprinting Mode is enabled.
+ if (nsContentUtils::ResistFingerprinting(aCallerType)) {
+ JsWarning("readPixels: Not allowed in Resist Fingerprinting Mode");
+ out_error.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
+ return false;
+ }
+
return true;
}
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