Vulnerability Assessment & Network Security Forums
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
Checks version of CUPS
Detailed Explanation for this Vulnerability Assessment
The remote host is running a CUPS server whose version number is
between 1.0.4 and 1.1.22 inclusive. Such versions are prone to
multiple vulnerabilities :
- A remotely exploitable buffer overflow in the 'hpgltops'
filter that enable specially crafted HPGL files can
execute arbitrary commands as the CUPS 'lp' account.
- A local user may be able to prevent anyone from changing
his or her password until a temporary copy of the new
password file is cleaned up ('lppasswd' flaw).
- A local user may be able to add arbitrary content to the
password file by closing the stderr file descriptor
while running lppasswd (lppasswd flaw).
- A local attacker may be able to truncate the CUPS
password file, thereby denying service to valid clients
using digest authentication. (lppasswd flaw).
- The application applys ACLs to incoming print jobs in a
case-sensitive fashion. Thus, a possible hacker can bypass
restrictions by changing the case in printer names when
submitting jobs. [Fixed in 1.1.21.]
***** Nessus has acertaind the vulnerability exists simply
***** by looking at the version number of CUPS installed on
***** the remote host.
See also : http://www.cups.org/str.php?L700
Solution : Upgrade to CUPS 1.1.23 or later.
Network Security Threat Level: High
Networks Security ID: 11968, 12004, 12005, 12007, 12200, 14265
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 George A. Theall
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