Amazon Linux 2 Security Advisory: ALAS-2018-962
Advisory Release Date: 2018-02-20 21:46 Pacific
Advisory Updated Date: 2018-02-21 21:23 Pacific
Speculative execution branch target injection
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-2017-5715 triggers the speculative execution by utilizing branch target injection. 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 and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks.(CVE-2017-5715)
Affected Packages:
linux-firmware
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update linux-firmware to update your system.
noarch:
linux-firmware-20170606-58.gitc990aae.amzn2.noarch
iwl100-firmware-39.31.5.1-58.amzn2.noarch
iwl105-firmware-18.168.6.1-58.amzn2.noarch
iwl135-firmware-18.168.6.1-58.amzn2.noarch
iwl1000-firmware-39.31.5.1-58.amzn2.noarch
iwl2000-firmware-18.168.6.1-58.amzn2.noarch
iwl2030-firmware-18.168.6.1-58.amzn2.noarch
iwl3160-firmware-22.0.7.0-58.amzn2.noarch
iwl3945-firmware-15.32.2.9-58.amzn2.noarch
iwl4965-firmware-228.61.2.24-58.amzn2.noarch
iwl5000-firmware-8.83.5.1_1-58.amzn2.noarch
iwl5150-firmware-8.24.2.2-58.amzn2.noarch
iwl6000-firmware-9.221.4.1-58.amzn2.noarch
iwl6000g2a-firmware-17.168.5.3-58.amzn2.noarch
iwl6000g2b-firmware-17.168.5.2-58.amzn2.noarch
iwl6050-firmware-41.28.5.1-58.amzn2.noarch
iwl7260-firmware-22.0.7.0-58.amzn2.noarch
iwl7265-firmware-22.0.7.0-58.amzn2.noarch
src:
linux-firmware-20170606-58.gitc990aae.amzn2.src