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Critical Remote Code Execution Flaw Fixed In Popular Terminal App For MacOS

itwbennett shares a report from CSO: iTerm2 users: It’s time to upgrade. A security audit sponsored by the Mozilla Open Source Support Program uncovered a critical remote code execution (RCE) vulnerability in the popular open-source terminal app for macOS. ITerm2 is an open-source alternative to the built-in macOS Terminal app, which allows users to interact with the command-line shell. Terminal apps are commonly used by system administrators, developers and IT staff in general, including security teams, for a variety of tasks and day-to-day operations.

The iTerm2 app is a popular choice on macOS because it has features and allows customizations that the built-in Terminal doesn’t, which is why the Mozilla Open Source Support Program (MOSS) decided to sponsor a code audit for it. The MOSS was created in the wake of the critical and wide-impact Heartbleed vulnerability in OpenSSL with the goal of sponsoring security audits for widely used open-source technologies. The flaw, which is now tracked as CVE-2019-9535, has existed in iTerm2 for the past seven years and is located in the tmux integration. Tmux is a terminal multiplexer that allows running multiple sessions in the same terminal window by splitting the terminal screen. The flaw was fixed in iTerm2 version 3.3.6, which was released today.

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