Sun Response to M-Class Server Denial of Service (DoS) Report
By paulson on Dec 05, 2008
was reported by three OpenBSD developers to the Full-Disclosure mailing
The issue as described relates that the OpenBSD/sparc64 kernel can trigger
a fault which causes the dynamic domain of a Sun M-class server to power
down. Sun has investigated this issue and would like to provide the
following details to help clarify the impact as well as the contributing
- This issue applies to Sun SPARC Enterprise M4000 Servers and Sun
SPARC Enterprise M5000 Servers only.
- This issue does not apply to the above systems when Solaris is
- This issue is seen with OpenBSD/sparc64 due to a device driver and
thus can not be triggered by an unprivileged user.
- The OpenBSD/sparc64 device driver causes a hardware fault to occur
and since the dynamic domains in Sun SPARC Enterprise M4000 and
M5000 servers share major hardware components the hardware fault
causes the M-class server processor to shut down the entire platform.
- The Sun SPARC Enterprise M4000 and M5000 servers are cold service
systems and thus to clear a hardware fault the system must be powered