VIGILANTE-2000014: HP Jetdirect multiple DoS

[Peter Gründl <prg () vigilante com>]

HP Jetdirect multiple DoS

Advisory Code:   VIGILANTE-2000014

Release Date:
October 10, 2000

Systems Affected:
("x" means any valid firmware letter)
- Printers with HP JetDirect Firmware x.08.04
- Printers with HP JetDirect Firmware x.08.05
- Printers with HP JetDirect Firmware x.08.20
- Likely other versions as well

THE PROBLEMS
The firmware in the HP JetDirect card contain multiple vulnerabilities
that can have effects ranging from the service crashing to the printer
initiating a firmware upgrade based on random garbage in the memory,
and in the last case powercycling won't fix the crash. It requires a
new firmware burn by eg. HP to restore the Jetdirect card.

The FTP service, the TELNET service and the LPD service all contain
buffer handling problems. Furthermore, the JetDirect IP implementation
contains a vulnerability that will cause the printer to crash, if a
certain malformed packet is sent to the printer. This packet can be
spoofed.

Vendor Status:
The vendor was contacted on the 25th of August and the vulnerabilities
were verified by them on the 7th of September.

Fix:
The new firmware versions can be retrieved using the following URL:
http://www.hp.com/cposupport/networking/software/allhpjd3.exe.html


Vendor   URL: http://www.hp.com
Product  URL: http://www.pandi.hp.com/pandi-db/home_page.show

Copyright VIGILANTe 2000-08-25

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