Chroot Escape Vulnerability in GNU Coreutils Allows Unauthorized Session Access

CVE-2016-2781

What is CVE-2016-2781?

A vulnerability in the GNU coreutils package allows local users to escape from a chroot jail when using the --userspec option. The vulnerability arises from the improper handling of the TIOCSTI ioctl call, which can be exploited to push arbitrary characters into the terminal's input buffer, facilitating unauthorized access to the parent session. This flaw can lead to a significant security risk if exploited, as it undermines the intended restrictions provided by the chroot environment.

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