> Date: Thu, 15 Feb 2018 17:33:12 -0500 > From: Oren Watson via Unicode <[email protected]> > > https://securelist.com/zero-day-vulnerability-in-telegram/83800/ > > You could disallow these characters in filenames, but when filename handling > is charset-agnostic due to the > extended-ascii principle this is impractical. I think a better solution is to > specify a visible form of these > characters to be used (e.g. through otf font variants) when security is of > importance.
Emacs has a special function that searches a given region of a buffer of text or of a text string for characters whose Bidi_Class property has been overridden by RLO or LRO. Emacs application programs can use this function to detect and flag such regions of text, and prevent such malicious attacks.
