Messages in this thread | | | Date | Tue, 31 May 2011 12:07:44 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC][PATCH] Randomize kernel base address on boot |
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On 05/31/2011 12:03 PM, Dan Rosenberg wrote: > > Just for the record, I've put this patch on hold until there's some more > consensus about whether boot-time randomization of the physical kernel > address is the best approach. There are some other potential issues > that haven't been brought up yet publicly, such as the possibility of > local attackers performing cache timing attacks to find the kernel image > location at runtime, which may make traditional ASLR somewhat pointless > regardless (except in the case of remote attackers, I suppose). Perhaps > HPA's suggestion of further modularizing the kernel would have some > advantages in this regard. >
I'm probably going to implement the whole-image randomization as an option in the Syslinux bootloader; it is a *lot* easier to do this correctly in the bootloader.
-hpa
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