Ask for input in terminal on mac code#
Poison the branch predictor, such that victim code is speculativelyĮxecuted past boundary and security checks. This advisory discusses three ways to cause speculative execution toĪccess sensitive memory areas (named here according to the If an attacker can cause speculativeĮxecution to access sensitive memory areas, they may be able to inferįurthermore, these guesses can often be 'poisoned', such that attackerĬan cause logic to reliably 'guess' the way the attacker chooses. These side effects can subsequently be detected byĪn attacker to determine information about what happened during the Other side effects, such as changes to TLB or cache state, which are Unfortunately, although architectural state is rolled back, there are
This is sometimes called "speculative execution". Reverted but the whole process is no slower than if no guess had been Guess is incorrect, partially-executed instructions are cancelled andĪrchitectural state changes (to registers, memory, and so on) If the guess is correct, execution has been sped up. Result of previous instructions or checks which have not yetĬompleted, execution happens based on guesses about what the outcome In cases where instructions depend on the Modern superscalar processors actually begin executing many However, in order to most efficiently use cpu resources, Processors give the illusion of a sequence of instructions executed State in Description that Xen ARM guests run in a separate address Remove erroneous detail about when Xen direct maps the whole of Say explicitly in Vulnerable Systems that HVM guests cannot exploitĬlarify that SP1 and SP2 can be exploited against other victimsīesides operating systems and hypervisors. (When available and deployed, it will eliminate the SP3Īdd colloquial names and CVEs to the relevant paragraphs in Issue Move description of the PV-in-PVH shim from Mitigation to Resolution.
Mention that resolutions for SP1 and SP3 may be available in the Information leak via side effects of speculative execution Follow on Twitter for new release announcements and other news
0 kommentar(er)
