commit dec0e3333825d7ea0339e12bdd5b87e418e19e1a Author: Georg Koppen gk@torproject.org 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 4b5e0287ee9e..d1d63f4ac953 100644 --- a/dom/canvas/ClientWebGLContext.cpp +++ b/dom/canvas/ClientWebGLContext.cpp @@ -4673,6 +4673,14 @@ 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; }