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Seems to me that there is a need to remain online, esp. for business users and that even when this is corrected, there will be a need to go back online to get the Apple patch. e.g. Is removing bash a viable workaround to remain secure for the moment.

  • Duplicate question: security.stackexchange.com/a/68204/52676 You'll have to be online at some point to patch your system. Unless you already have the bash source code and compile a patch yourself. – RoraΖ Sep 25 '14 at 18:26
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    No this question is intended to ask about any possible workarounds that could mitigate the risks, not necessarily how to patch bash. I'll update my question to clarify. – Brad Thomas Sep 25 '14 at 18:54
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Business users can mitigate their risk using their perimeter IPS protection (or palo alto nextgen firewalls) for CVE-2014-6271 but need to wait for released protection on the related CVE-2014-7219 over the next 24 hours.

Source (in my case palo alto): https://securityadvisories.paloaltonetworks.com/

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Here ia a basic set of pretty simple rules for an end user:

Are Macs vulnerable to the Bash shellshock bug?.

The purpose is to remove any remote access to a shell, may it be directly /bin/bash or any other shell which may let switch to /bin/bash and use it to escalate priviledge.

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The patch for the bug is available here:

Apple bash bug patch

It is possible to Airdrop connect to another device, transfer the patch DMG from that device and then install the patch - all without connecting the target machine to the internet.

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