A few days after leakage of Red Star OS North Korea to the West, in the form of an ISO, security researchers have begun to expose its vulnerabilities.
According this publication in Seclists, the udev rules in version 3.0 of the USA and the rc.sysint script in version 2.0 is so world writable. Both have root privilege.
Due to Red Star 3.0's file permissions management, the device manager rules for HP LaserJet printers (1000 series), (/etc/udev/rules.d/85-hplj10xx.rules), can be modified to RUN+= arguments . These commands can be run in udev daemon as root. Exists a presentation at GitHub.
udev's main job is to monitor the /dev (devices) directory, and when the device is plugged into a USB port, it loads the appropriate rule set.
By writing to the rc.sysint file at oldest Red Star OS 2.0, an attacker can execute commands as root (demonstration).
Both vulnerabilities provide privilege escalation for local users.
Download it redstar_desktop3.0_sign.iso
