Sure, once you have root on the host system you can pretty much do whatever you want … adding entries to udev isn’t anything revolutionary.
“At the time of this writing, the persistence technique used (udev rules) is not documented by MITRE ATT&CK,” the researchers note, highlighting that sedexp is an advanced threat that hides in plain site.
These rules contain three parameters that specify its applicability (ACTION== “add”), the device name (KERNEL== “sdb1”), and what script to run when the specified conditions are met (RUN+=“/path/to/script”).
“Malware”? Fucking cybersec press is the worst.
What’s next, they’re gonna call “sudo” a 0-day vuln?
Not 0-day but it had a vew privilege escalation vulns already. https://thekh4tt4k.medium.com/sudo-vulnerability-in-linux-lead-to-privilege-escalation-cve-2023-22809-fbb7f300ef49
Sure, but this isn’t a privilege escalation, this requires privilege escalation, and it merely installs a backdoor that preserves that privilege.
It’s like installing something in cron or systemd, it’s not a vulnerability in itself, but it can allow an attacker to add a backdoor once they exploit a vulnerability once.