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Diffstat (limited to 'firewire.md')
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diff --git a/firewire.md b/firewire.md deleted file mode 100644 index 63ac7f4..0000000 --- a/firewire.md +++ /dev/null @@ -1,23 +0,0 @@ -[[!toc levels=4]] - -Firewire -======== - -Para evitar [dumps de memória via firewire](http://links.sarava.org/tags/firewire), [este artigo](http://www.hermann-uwe.de/blog/physical-memory-attacks-via-firewire-dma-part-1-overview-and-mitigation) oferece a mitigação ideal via `/etc/modprobe.d/blacklist`: - - # Physical memory attacks via Firewire/DMA Mitigation - # Prevent automatic loading of the ohci1394 module. - blacklist ohci1394 - # Prevent manual loading of the ohci1394 module. - install ohci1394 false - # Iff we should ever load the ohci1394 module, force the use of the 'phys_dma=0' option. - options ohci1394 phys_dma=0 - -Depois dessa configuração, é preciso atualizar a `initrd` de cada sistema, através do comando - - update-initramfs -v -u - -Feito isso, o firewire pode ser desabilitado nos sistemas que estão rodando simplesmente com um - - rmmod ohci1394 - |