ALAS-2018-1038 --- kernel perf
|ID: oval:org.secpod.oval:def:1600896||Date: (C)2018-06-12 (M)2018-10-30|
|Class: PATCH||Family: unix|
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions . It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit . As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks.By mmaping a FUSE-backed file onto a process's memory containing command line arguments , an attacker can cause utilities from psutils or procps or any other program which makes a read call to the /proc/<pid>/cmdline files to block indefinitely or for some controlled time .
|Amazon Linux AMI|