X.org, which develops the open-source X Window System for Linux and other Unix-y desktops, has warned security flaws have been discovered in the code – and some of them have been hanging around for 27 years.
The bugs can be exploited by applications to crash the window system, or run malicious code as the root user if the X server is running with those privileges.
The programming blunders were discovered by Ilja van Sprundel, a security researcher at IOActive, and cover how the X Server handles requests from client apps.
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