Catalin Cimpanu, writing for ZDNet: A security researcher has discovered a vulnerability in the WebKit rendering engine used by Safari that crashes and restarts the iOS devices — iPhones and iPads. The vulnerability can be exploited by loading an HTML page that uses specially crafted CSS code. The CSS code isn’t very complex and tries to apply a CSS effect known as backdrop-filter to a series of nested page segments (DIVs). Backdrop-filter is a relative new CSS property and works by blurring or color shifting to the area behind an element. This is a heavy processing task, and some software engineers and web developers have speculated that the rendering of this effect takes a toll on iOS’ graphics processing library, eventually leading to a crash of the mobile OS altogether.

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Source: Slashdot – Vulnerability in WebKit Crashes and Restarts iPhones and iPads