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2d
comment Are Macs vulnerable to the Bash shellshock bug?
Ain't such a big deal but you guys are repeatedly saying things that're technically wrong. You cannot be 100% sure without doing more legwork. Apple might've done that legwork for their servers that remain up with firewall enabled before issuing their statement, but actually I doubt they did even that much. It's probably fine but one should still bust Apple's chops for being so painfully slow to fix their bash itself.
2d
comment Are Macs vulnerable to the Bash shellshock bug?
Yes strings .. | grep SHELL is far more useful than bash, but not absolute. Imho nm -a ... | grep system is the most important, and exec helps too, but that's only for vanilla BSD, Linux, etc. software Apple's libraries offer different routines. Just use the Cocoa way for example : stackoverflow.com/questions/412562/…
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comment Are Macs vulnerable to the Bash shellshock bug?
Not quite. One must review the symbols called by the library that otool -L /usr/libexec/bootpd reports that contains an exec call. And the strings command is pointless since environment variables determine the shell called. I'm impressed however that no liked library calls system.
Sep
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revised Are Macs vulnerable to the Bash shellshock bug?
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Sep
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reviewed Approve suggested edit on Are Macs vulnerable to the Bash shellshock bug?
Sep
26
comment Are Macs vulnerable to the Bash shellshock bug?
heh. SE edit boxes don't like the Mac's spelling corrector, always creates premature comments. Sorry about that. Anyways..
Sep
26
comment Are Macs vulnerable to the Bash shellshock bug?
I already mentioned that recompiling bash is overkill myself. The correct response for ordinary desktop uses is to turn on firewall and turn off sharing services OR to accept that they're trusting the firewall provided by their router. That's what my comment says. You single out a probably usually non-vulnerable server, ssh, and ignores that an awful lot of people doing rudimentary local web server with unknown active scripting.
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Sep
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comment Are Macs vulnerable to the Bash shellshock bug?
In fact, your answer is totally wrong!!! Ordinary ssh usage isn't vulnerable since you're already opening a shell, only ssh's restricted login command is vulnerable. Almost no Linux users even know about that, so like no Mac users do.
Sep
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revised Are Macs vulnerable to the Bash shellshock bug?
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Sep
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comment How do I recompile Bash to avoid Shellshock (the remote exploit CVE-2014-6271 and CVE-2014-7169)?
I posted a comment here that advised simply turning off all the servers : apple.stackexchange.com/a/147180/13192 It's less solid than this, as Apple's DHCP, Bonjour, etc. might be vulnerable, but it's more the OS X way for folks afraid of the shell.
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revised Are Macs vulnerable to the Bash shellshock bug?
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comment Are Macs vulnerable to the Bash shellshock bug?
As I said below, ALL servers should be assumed to call bash unless proven otherwise. And Mac OS X is full of privilege escalation exploits once you reach a shell.
Sep
26
comment Are Macs vulnerable to the Bash shellshock bug?
Apache modules, CGI scripts, etc. commonly call bash. Very effective hack right here : twitter.com/JZdziarski/status/515135854436962304 And even if your Apache configuration does not call bash under normal operation, no telling what an attacker can convince it to do.
Sep
26
comment Are Macs vulnerable to the Bash shellshock bug?
How do you know that? Initial advisory was a vulnerable DHCP client. And many articles speculate that Mac OS X and/or iOS DHCP clients might be vulnerable. All servers should be assumed to be vulnerable unless proven otherwise.
Sep
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answered Are Macs vulnerable to the Bash shellshock bug?
Sep
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comment Are Macs vulnerable to the Bash shellshock bug?
There are likely privilege escalation risks from a guest account too. Who cares though? Any Mac OS X machines is extremely vulnerable once users get access, especially local users. It's server daemons that should scare you, not just sshd though, all server daemons.
Sep
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comment Are Macs vulnerable to the Bash shellshock bug?
-1 Very wrong. There are many tools that use bash : Installation scripts usually use bash, creating privilege escalation risks. All servers should be assumed to use bash unless you know otherwise, not just sshd. In particular, apache could create a remote vulnerability using bash. etc.
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