Rapid7 Vulnerability & Exploit Database

RHSA-2002:089: Relaxed LPRng job submission policy

Back to Search

RHSA-2002:089: Relaxed LPRng job submission policy



The LPRng print spooler, as shipped in Red Hat Linux 7.x, accepts all remote print jobs by default.

With its default configuration, LPRng will accept job submissions from any host, which is not appropriate in a workstation environment. We are grateful to Matthew Caron for pointing out this configuration problem. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0378 to this issue. The updated packages from this advisory change the job submission policy (in /etc/lpd.perms) so that jobs from remote hosts are refused by default. Those running print servers may want to adjust this policy as appropriate, for example to give access to certain hosts or subnets. For details on how to do this see the lpd.perms(5) man page. Since Red Hat Linux 7.1, default installations include ipchains rules blocking remote access to the print spooler IP port; as a result those installations already reject remote job submissions. However, Red Hat Linux 7 machines and any machine upgraded to a later release (as opposed to having been freshly installed) will not have ipchains rules in place by default. IMPORTANT: There are special instructions for installing this update listed below.


  • redhat-upgrade-lprng

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center