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CA-2001-32 Buffer Overflow in HP-UX Line Printer Daemon
release date: November 21, 2001
Last revised: --
revision history can be found at the end of this file.
Servers running the following releases:
* HP-UX Version 10.10
* HP-UX Version 10.20
* HP-UX Version 11.00
* HP-UX Version 11.11
line printer daemon (rlpdaemon) enables various clients
to share printers over a network. A remotely exploitable buffer
overflow vulnerability exists in the rlpdaemon.
a specially crafted print request to an HP-UX host
running the rlpdaemon, a local or remote attacker can trigger the
buffer overflow. Intruders may find this vulnerability attractive
to exploit because the line printer daemon is enabled by default to
provide printing services. Additionally, no previous knowledge of
or access to the vulnerable system is required for exploitation.
Security Systems (ISS) and Hewlett-Packard Company have
issued the following announcements, respectively:
Logic Flaw Vulnerability in HP-UX Line Printer Daemon
Company Security Bulletin #0176
has been assigned the identifier CAN-2001-0817
by the Common Vulnerabilities and Exposures (CVE) group:
latest and most detailed information about this
vulnerability, please see VU#638011.
can execute arbitrary code on the target system with
the privileges of the line printer daemon, typically superuser.
a patch from HP. More information is available in Appendix
access to the lpd service
As a general
practice, we recommend disabling all services that are
not explicitly required. You may wish to disable the line printer
daemon until a patch can be applied. If you cannot disable the
service, you can limit your exposure to these vulnerabilities by
using a router or firewall to restrict access to port 515/TCP
(printer). Note that this does not protect you against attackers
from within your network.
A. - Vendor Information
contains information provided by vendors for this
advisory. When vendors report new information to the CERT/CC, we
update this section and note the changes in our revision
history. If a particular vendor is not listed below, we have not
received their comments.
see Hewlett-Packard Company Security Bulletin #0176.
B. - References
was discovered and researched by Mark Dowd and
Kris Hunt of Internet Security Systems (ISS). The CERT/CC thanks
ISS for the information contained in their advisory.
Ian A. Finlay.
is available from:
Phone: +1 412-268-7090 (24-hour hotline)
Fax: +1 412-268-6989
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2001 Carnegie Mellon University.
21, 2001: initial release
Version: PGP 6.5.8
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