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Bug 643340 (CVE-2017-5753)

Summary: [TRACKER] hw: cpu: speculative execution bounds-check bypass (CVE-2017-5753)
Product: Gentoo Security Reporter: GLSAMaker/CVETool Bot <glsamaker>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Severity: normal CC: bertrand, capsel+bugzillagentoo, gentoo-bugzilla, georg, github, kfm, pacho, peter.volkov, randy, remy, sergeev917, z23
Priority: Normal Keywords: Tracker
Version: unspecified   
Hardware: All   
OS: Linux   
Package list:
Runtime testing required: ---
Bug Depends on: 643350, 643352, 644026, 644128, 645510    
Bug Blocks: 643228    

Description GLSAMaker/CVETool Bot gentoo-dev 2018-01-04 01:01:24 UTC
Incoming details.
Comment 1 Thomas Deutschmann gentoo-dev Security 2018-01-04 01:11:12 UTC
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited.

Variant CVE-2017-5753 triggers the speculative execution by performing a bounds-check bypass. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall boundary and read privileged memory by conducting targeted cache side-channel attacks.


External References:
Comment 2 Thomas Deutschmann gentoo-dev Security 2018-01-04 01:28:35 UTC
Converting into tracker bug, needed for Xen as well.
Comment 3 NATTkA bot gentoo-dev 2020-04-10 08:31:17 UTC
Unable to check for sanity:

> no match for package: x11-drivers/nvidia-drivers-390.12
Comment 4 NATTkA bot gentoo-dev 2020-04-12 19:31:01 UTC
Unable to check for sanity:

> dependent bug #644026 has errors
Comment 5 NATTkA bot gentoo-dev 2020-04-13 14:41:44 UTC
Resetting sanity check; package list is empty or all packages are done.
Comment 6 John Helmert III gentoo-dev Security 2021-06-12 14:27:24 UTC
Seems to be an obsolete tracker, closing.