Sudo Chroot Privilege escalation Exploit (CVE-2025-32463)

A critical vulnerability (CVE-2025-32463) was discovered in Sudo versions 1.9.14 through 1.9.17. The vulnerability allows local users to obtain root access by exploiting the --chroot option, where /etc/nsswitch.conf from a user-controlled directory is used. This exploit creates a temporary directory structure that mimics a normal root environment, uploads a malicious /etc/nsswitch.conf which in turn calls a shared object that escalates privileges, the exploit is triggered when executing sudo with the -R flag pointing to the user controlled directory.