HackTheBox - EvilCUPS
Source: YouTube · IppSec · published Oct 2, 2024 · 43:27
This video demonstrates the exploitation of a critical vulnerability in the CUPS Linux print server within the "Evil Cups" Hack The Box machine, showing how a high CVSS score is justified by remote exploitability.
Key Takeaways:
• The box is based on a real-world vulnerability in CUPS where the service listens on UDP port 631, allowing unauthenticated users to create printers that execute arbitrary commands when print jobs are processed 0:07.
• Although the vulnerability originally required a print job to trigger, attackers can use the CUPS management server to remotely trigger these print jobs, bypassing the need for local access 0:37.
• The high CVSS score was initially dismissed by some as theoretical because printing is rare on Linux servers, but this scenario proves it is a significant remote code execution risk 0:21.
The demonstration highlights the importance of securing default services and not underestimating vector-specific vulnerabilities.
Sources:
Generate CPE Credits
Generate a professional CPE document from this video's transcript.
Estimated credit: 0.5 CPE hours
Estimate uses the video runtime (1 hour ≈ 1 CPE, rounded to the nearest 0.5, minimum 0.5, maximum 2.0). The final amount can be lower after review, never higher.
Topic: Penetration Testing. Commonly maps to: Security Assessment and Testing, Security Operations. Exact CISSP domains are assigned during generation.
Free account. One generation at a time, with a daily limit.
CPEBuddy is independent and not affiliated with or endorsed by ISC2, ISACA, or any certification body. Exports are formatted for common CPE submissions; acceptance is at your certification body's discretion.
Transcript Preview
First 800 characters of the transcript
what's going on YouTube this is ipeg we're doing evil cups from hack the box which is a non-competitive release so we can do a video on it right away the box is based on all the work evil socket did finding a vulnerability in cups which is the main Linux print server and by default it listens on UDP Port 631 on all host and this caused it to get a very high CVSs score because anyone that could talk to that UDP socket could then create a printer on the host that would execute a command when something is printed to it however because it required someone uh something being printed many people online kind of dismissed the high CVSs score because printing just doesn't happen on Linux all that often there are ways to remotely trigger print jobs in this box we will use the cups management server …