jetdirect.crash.txt

1999-11-20T00:00:00
ID PACKETSTORM:11422
Type packetstorm
Reporter Tobias Haustein
Modified 1999-11-20T00:00:00

Description

                                        
                                            `--SLDf9lqlvOQaIe6s  
Content-Type: text/plain; charset=us-ascii  
Content-Transfer-Encoding: quoted-printable  
  
Hi folks!  
  
I just played with our network printer (a HP LaserJet 4500) and --  
boom -- it crashed ;-)=20  
  
The HP JetDirect J3111A module with firmware G.05.35 suffers from a  
buffer overflow in it's internal web server. If you enter the  
following URL in your web browser  
  
http://my-printer's-ip/very-long-rubbish(256 bytes or so)  
  
the printer prints a diagnostics page showing the contents of all  
registers and the following 64 bytes of all memory addresses that  
address registers point to.  
  
Obviously it's a M680x0 CPU with 512 KB of RAM in our model, so  
writing an exploit should be fairly easy. The nice point about it is  
that most people wouldn't expect their printer to be compromised --  
and since there is no logging on the printer, you can't easily be  
tracked down...  
  
Ciao,  
  
Tobias  
  
PS: I searched the web page of HP for any e-mail-address that could be=20  
used to inform them about bugs, but i did not find any e-mail-address  
at all. The web site seems to be one-way...=20  
  
--=20  
Dipl. Inform. Tobias Haustein  
  
Department of Computer Science IV, Aachen University of Technology  
Ahornstr. 55, D-52056 Aachen  
Phone +49 (241) 80-21417, Fax +49 (241) 8888-220  
E-Mail haustein@informatik.rwth-aachen.de  
Web http://www-i4.informatik.rwth-aachen.de/~haustein/  
  
--SLDf9lqlvOQaIe6s  
Content-Type: application/pgp-signature  
  
-----BEGIN PGP SIGNATURE-----  
Version: PGPfreeware 5.0i for non-commercial use  
MessageID: H+VKmigVK59pAjCnxblKrhcnezMKRLG5  
  
iQEVAwUBODUe6xs02tO3FOYBAQHkAQgAmZ2khTPxMP9L6hV3wj/srGHw8GKlG6ix  
pB8YZ9v2M/I+OrTaaviHUObgQA+mP6jXhb++xA0tLYFLc70ktfh8p2bsLc+a31Pu  
lKbRTyydc2/gB9LKXj5uX+3SwG+6s8zcB59njKRQCL52sUiY88YwEtReVqrrs9DX  
AovmzhlZGouWc0jUsgVsA6Ou3uEyDtQSZCvX573c4PBv0fMn6+ZdRM/qs1Movo98  
Q4ilXJpIuM84wSZUg3jko6gaXSY4kc8vTAh7yKsNqqX4Kve5ZTRGZUn50MKS1hKM  
nFw3ArqwZui4QDH7U+feJcCspx7FALIfuenZ9wJSUJq276moBjs2Gg==  
=1zrQ  
-----END PGP SIGNATURE-----  
  
  
`