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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Check for the version of the lprng, html2ps package
Detailed Explanation for this Vulnerability Assessment
The remote host is missing the patch for the advisory SUSE-SA:2002:040 (lprng, html2ps).
The lprng package contains the 'runlpr' program which permits the lp
user to execute the lpr program as root. Local attackers can pass
certain commandline arguments to lpr running as root, fooling it
to execute arbitrary commands as root. This has been fixed.
Note that this vulnerability can only be exploited if the attacker
has previously gained access to the lp account.
Additionally, the html2ps printfilter, which is installed as part of
the LPRng print system, permited remote attackers to execute arbitrary
commands in the context of the lp user.
These two issues combined permit attackers to mount a remote root attack.
As a workaround, we recommend to uninstall the html2ps package, and
restrict access to your print services to authorized hosts only.
Access control to lpd is implemented by adding appropriate entries to the
/etc/lpd.perms file. Please consult the lpd.perms(5) manpage, or add the
to your /etc/lpd.perms file to deny access to everyone from the outside.
Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command 'rpm -Fhv file.rpm' to apply
Solution : http://www.suse.de/security/2002_040_lprng_html2ps.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security
|Sonicwall E5500 NSA E5500 1RK22-073 C-09217 Security Appliance
|2x Cisco PIX 501 Firewall with Power Supply Adapter
|Netgear ProSafe FVX538v2 – VPN Firewall 8-Port 10/100, 1 Gigabit + 5 User Lic
|SonicWALL TZ100 APL22-07F Network Security Appliance Firewall
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