4 ms·

So it's your contention that Intel never guaranteed that ring 0 protected memory couldn't be read by code running in ring 3, thereby rendering the concept of me

So it's your contention that Intel never guaranteed that ring 0 protected memory couldn't be read by code running in ring 3, thereby rendering the concept of memory read protection useless by design?

mehrdadn 9y ago
> So it's your contention that Intel never guaranteed that ring 0 protected memory couldn't be read by code running in ring 3. Assuming by "read" you mean "inferred", yes, I'm not aware of any such guarantee, but again, I of course have't read everything they have published, so by all means prove me wrong.
- nebulous1 9y ago
  Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3A 4-30 4.6.1 Determination of Access Rights For user-mode accesses: — Data reads. Access rights depend on the mode of the linear address: ... • Data may not be read from any supervisor-mode address.
  - mehrdadn 9y ago
    And this contradicts the above how, exactly?
  - nebulous1 9y ago
    > And this contradicts the above how, exactly? Documentation: Data may not be read from any supervisor-mode address. Published vulnerability: Data may be read from any supervisor-mode address.