Bugtraq mailing list archives
Re: Intel Pentium Bug
From: travish () DEJANEWS COM (Travis Hassloch)
Date: Tue, 11 Nov 1997 20:22:02 -0600
In message <Pine.SUN.3.94.971107193930.26939A-100000 () dfw dfw net>, Aleph One wr ites:
If Intel where to provide a program to update the microcode on the CPU it would most probably be disassembled and reverse engineered quickly. Whats a multi-billion company to do?
http://techweb.cmp.com/eet/news/97/961news/ibug.html
"Each BIOS Update is tailored for a particular stepping of [a] processor," according to Intel technical documentation obtained by EE Times. "The data within the update is encrypted by Intel and is designed such that it is rejected by any stepping of the processor other than its intended recipient. The encryption scheme also guards against tampering of the update data and provides a means for determining the authenticity of any given BIOS update." The heart of BIOS Update is a block of data precisely 2,048 bytes in length. Of that block, 2,000 bytes are the actual update; the remainder is header and checksum information. The update gets loaded into the processor by an "update loader," which BIOS vendors are required to include in the firmware they provide for use with Intel's CPUs.
-- Travis Hassloch / travish () dejanews com / http://www.dejanews.com Deja News System Administration Group / "When news breaks... we fix it." PGP key C7FDD3D5 fgpt 7A 48 DD 46 E6 7F 11 E7 8F 7E 53 9A DF 33 9E FA
Current thread:
- Re: Intel Pentium Bug, (continued)
- Re: Intel Pentium Bug George Imburgia (Nov 07)
- Re: Intel Pentium Bug Kragen \ (Nov 07)
- Re: Intel Pentium Bug Chris Pascoe (Nov 07)
- Re: Intel Pentium Bug Stefan Hudson (Nov 07)
- Re: Intel Pentium Bug Aleph One (Nov 07)
- Re: Intel Pentium Bug Eric Allman (Nov 07)
- Re: Intel Pentium Bug Dean Gaudet (Nov 07)
- Re: Intel Pentium Bug George Imburgia (Nov 07)
- Re: Intel Pentium Bug Dean Gaudet (Nov 07)
- Re: Intel Pentium Bug Colin Jenkins (Nov 07)
- Re: Intel Pentium Bug George Imburgia (Nov 07)
- Re: Intel Pentium Bug Travis Hassloch (Nov 11)
- Re: WARNING: Linux Intel Pentium Bug Roger Espel Llima (Nov 09)
- Re: solaris (fwd) Corey Lindsly (Nov 09)
- Re: solaris (fwd) James Lockwood (Nov 09)
- Re: solaris (fwd) Dalvenjah FoxFire (Nov 09)
- Re: WARNING: Linux Intel Pentium Bug Tim Newsham (Nov 07)
- Re: WARNING: Linux Intel Pentium Bug Alan Cox (Nov 08)