[NEWS] HP ProCurve Switch Denial of Service Attack

From: support@securiteam.com
Date: 07/28/02


From: support@securiteam.com
To: list@securiteam.com
Date: Sun, 28 Jul 2002 08:21:49 +0200 (CEST)

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  HP ProCurve Switch Denial of Service Attack
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SUMMARY

HP ProCurve Switches are the leading products in the switching market
offered by Hewlett Packard. A security vulnerability in the product allows
attackers to issue a special SNMP Write command that will cause the switch
to crash upon contact with an HTTP or Telnet client.

DETAILS

Vulnerable systems:
 * Hewlett Packard (HP) ProCurve Switch (HP J4121A ProCurve Switch 4000M
revision C.07.23, ROM C.06.01)

HP Bug ID:
Not assigned

HP's SNMP variable (.iso.3.6.1.4.1.11.2.36.1.1.2.1.0) accessible by a
simple SNMP WRITE with 85 characters crashes the ProCurve Switch upon its
next connection with a Telnet or HTTP client.

Vendor status:
06/29/02 Initial Notification, security-alert@hp.com *Note-Initial
notification by phenoelit includes a cc to cert@cert.org by default
06/29/02 RBL blocked delivery to security-alert@hp.com
06/29/02 Creation of ho-mail account and retransmission
06/29/02 Auto-responder reply
07/01/02 Human contact, PGP exchange and acknowledge.
07/01/02 Clarification of some details w/HP Sec people
07/19/02 Notification of intent to post publicly in approximately 7 days.
07/23/02 Coordination for release date/times

Example:
linux# snmpwrite <switch_ip> private .iso.3.6.1.4.1.11.2.36.1.1.2.1.0 s
`perl -e 'print "A"x85;'`

ADDITIONAL INFORMATION

The information has been provided by <mailto:fx@phenoelit.de> X,
<mailto:kim0@phenoelit.de> kim0, and <mailto:zet@darklab.org> Zet.

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