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CA-2001-37 Buffer Overflow in UPnP Service On Microsoft Windows
release date: December 20, 2001
Last revised: --
revision history can be found at the end of this file.
* Microsoft Windows ME
* Microsoft Windows 98
* Microsoft Windows 98SE
in software included by default on Microsoft Windows
XP, and optionally on Windows ME and Windows 98, may allow an intruder
to execute arbitrary code on vulnerable systems, to launch
denial-of-service attacks against vulnerable systems, or to use
vulnerable systems to launch denial-of-service attacks against
is a vulnerability in the Universal Plug and Play (UPnP) service
on Microsoft Windows XP and Microsoft Windows ME that could permit an
intruder to execute arbitrary code with administrative privileges on
vulnerable system. The UPnP service is enabled by default on XP.
Microsoft does not ship Windows ME with UPnP enabled by default, but
some PC manufacturers do. UPnP may be optionally installed on Windows
98 and Windows 98SE. This vulnerability was discovered by Eeye Digital
Security. For more information, see
Plug and Play (UPnP) is a set of protocols that allow
computer systems and network devices to work together with little or
no prior configuration.
is a buffer overflow in the code that handles UPnP
NOTIFY directives. This vulnerability permits an intruder to send a
malicious NOTIFY directive to a vulnerable computer and cause the
computer to run code of the intruder's choice. The code will run with
full privileges on all vulnerable systems, including Windows XP. This
can permit an attacker to take complete control of the system.
vulnerability in the Microsoft Windows implementation of UPnP
could allow an intruder to consume memory and processor time on
vulnerable systems, resulting in performance degradation. Variations
on this problem can allow an intruder to use a vulnerable system to
launch a denial-of-service attack against a third-party.
information about these vulnerabilities, see
have been assigned the CVE identifiers
CAN-2001-0876 and CAN-2001-0877, respectively.
can gain complete control of vulnerable systems, or
interrupt the normal operation of vulnerable systems.
patch from your vendor
has provided patch information in their bulletin. Please see
MS01-059, available from
to UPnP Service
a patch can be applied, you can reduce your exposure to this
problem by blocking access to ports 1900 and 5000 at your network
border. This does not eliminate your exposure to attacks originating
from within your network, however.
Microsoft Internet Connection Firewall, which runs by
default on Windows XP, does not provide complete protection against
this attack. Specifically, an intruder can still use a broadcast or
multicast address to reach the UPnP service on Microsoft Windows. On
systems that don't require UPnP, it can be disabled.
Shawn V. Hernan
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2001 Carnegie Mellon University.
December 20, 2001: Initial release
Version: PGP 6.5.8
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