如何修复Fallout和RIDL？

Question

我安装了英特尔-微码，但当我使用./幽灵熔毁-检查. use我得到这个。

CVE-2018-12127 aka 'RIDL, microarchitectural load port data sampling (MLPDS)'
* Mitigated according to the /sys interface:  NO  (Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled)
* Kernel supports using MD_CLEAR mitigation:  YES  (found md_clear implementation evidence in kernel image)
* Kernel mitigation is enabled and active:  NO 
* SMT is either mitigated or disabled:  YES 
> STATUS:  VULNERABLE  (Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled)

我该怎么解决呢？我不明白

  sudo ./spectre-meltdown-checker.sh | grep 'CPU microcode is'
[sudo] password for user: 
  * CPU microcode is known to cause stability problems:  NO  (model 0x2d family 0x6 stepping 0x7 ucode 0x710 cpuid 0x206d7)
  * CPU microcode is the latest known available version:  NO  (latest version is 0x714 dated 2018/05/08 according to builtin MCExtractor DB v112 - 2019/05/22)
IBPB is considered as a good addition to retpoline for Variant 2 mitigation, but your CPU microcode doesn't support it
> STATUS:  VULNERABLE  (an up-to-date CPU microcode is needed to mitigate this vulnerability)

但这是最新的

sudo apt install intel-microcode
Reading package lists... Done
Building dependency tree       
Reading state information... Done
intel-microcode is already the newest version (3.20180807a.2~deb9u1).

Answer 1

在/etc/apt/ security .列表中的安全回购中是否启用了非免费的功能？

deb http://security.debian.org/ stretch/updates main contrib non-free

如果不是，启用非免费，apt-获取更新，并再次安装英特尔微码.它会安装一个新的软件包。重新启动并再次尝试幽灵-熔毁检查器。

Answer 2

您的CPU需要微码0x718来修复Fallout和RIDL；这是添加到intel-microcode中的20190618更新中的，在您上次更新时配置的存储库中是不可用的。

现在有了作为Debian 9的安全更新而被推送.，下次运行时应该会得到升级。

apt update && apt upgrade

(作为根)。相应的软件包版本为3.20190618.1~deb9u1。

您需要重新启动以应用微码更新。