我已经安装了最新的英特尔微码更新,以使用谱变体#2修复,但幽灵和熔毁检测器仍然显示,IBRS/IBPB不能使用。
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: YES
* Currently enabled features
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* IBPB enabled: NO
* Mitigation 2
* Kernel has branch predictor hardening (arm): NO
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: NO
> STATUS: VULNERABLE (Your kernel is compiled with IBRS but your CPU microcode is lacking support to successfully mitigate the vulnerability)dmesg显示已经安装了最新的修订版。
# dmesg | grep microcode
[ 1.199842] microcode: CPU0 sig=0x206d7, pf=0x1, revision=0x713
[ 1.199860] microcode: CPU1 sig=0x206d7, pf=0x1, revision=0x713
[ 1.199877] microcode: CPU2 sig=0x206d7, pf=0x1, revision=0x713
[ 1.199898] microcode: CPU3 sig=0x206d7, pf=0x1, revision=0x713
[ 1.199966] microcode: Microcode Update Driver: v2.01 <tigran@aivazian.fsnet.co.uk>, Peter OrubaCPU为Intel(R) Xeon(R) CPU E5-2420 0 @ 1.90GHz,主机类型为ESXi-5.1.0-20130402001-standard。
发布于 2018-04-06 16:10:53
超过5.5的ESXi版本不支持管理程序通过IBPB和IBRS的必要特性。详情请参见VMware KB条目。
为了减轻谱变体2的影响,您需要升级ESXi,或者切换到启用retpoline的内核。
https://unix.stackexchange.com/questions/436007
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