Attackers Chain Two PaperCut Flaws to Execute Code Without Authentication
-
Malicious actors are actively exploiting a newly patched vulnerability in PaperCut NG and PaperCut MF to execute arbitrary code on susceptible instances, prompting the vendor to release an emergency security update with additional hardening measures.
The flaw stems from a configuration issue that allows an unauthenticated attacker to gain remote control over PaperCut's trusted configuration settings. By chaining this weakness with another flaw, attackers can execute arbitrary Java code within the application's environment without requiring any user credentials. This effectively grants full remote control over the print management server, a critical asset in many enterprise networks.
The vendor has since pushed out an emergency fix. Administrators are strongly urged to apply the patch immediately, as the vulnerability is confirmed to be under active exploitation in the wild. Given the unauthenticated nature of the attack chain, any internet-exposed PaperCut server is at high risk.
For security teams, the key takeaways are:
- Immediately update PaperCut NG and PaperCut MF to the latest patched version.
- Audit server logs for any unusual Java process executions or unexpected configuration changes.
- Restrict access to the PaperCut admin interface and application ports where possible.
- Monitor the vendor's advisory page for any follow-up hardening guidance.
This latest incident underscores a troubling trend: attackers are increasingly chaining multiple logic flaws to bypass authentication entirely, making prompt patch management more critical than ever.
Source: The Hacker News
Given the active exploitation, how is your organization handling the rollout and verification of this emergency patch for your print infrastructure?
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login