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OS X sudoers exploit found in the wild

blog.malwarebytes.org

21–30 of 193 posts

Re: OS X sudoers exploit found in the wild

#21
I'm not sure who makes me more cranky: Apple for apparently sitting on the fix, or Stefan Esser for flinging the vulnerability into the breeze for anyone to catch.

Esser has his reasons - "Short reminder: Europeans are not allowed to disclose vulns privately to a foreign company like Apple without registering dual-use export"[1] - but it's hard to believe he couldn't have told them anonymously. Disclosures make careers, though, so there's a strong incentive to go public.

[1] https://twitter.com/i0n1c/status/624172774915973120

Re: OS X sudoers exploit found in the wild

#22
post #19

Earlier quoted context omitted.

Keeping the OS up to date wouldn't have helped with this.

10.9.5 is not even up to date. There are security fixes which were not backported from OS X 10.10 Yosemite (the current release).

Exploits, and high risk vulnerabilities are certainly being closed with security updates. That's their purpose. Major changes aren't practical for Apple, and they do everything they can to incentivize (badger) people into upgrading to the current version.

Re: OS X sudoers exploit found in the wild

#24
post #6

Isn't this the time when Mac App Store supposed to shine? When they found something that's dodgy and linked to a company that has apps on App Store, can't they just turn on the kill switch? That way the malware won't have anywhere to direct the users to.

It's not clear whether this "adware installer" is signed by a developer cert. I'm gonna guess it isn't, which means under the default settings, if a user double-clicks it to execute it, they'll be presented with a message saying that the app can't be run because it's "from an unknown developer" and the current settings disallow it. The user can get around that by right-clicking it and choosing "Open" (or switching Ga…

One could easily make an "app" which just runs a shell script with this exploit - no code signing needed.

Re: OS X sudoers exploit found in the wild

#25
post #20

Oh man, I really want to do it on all the macs at the Apple store, and start a little botnet. Problem is, I don't really have any use for 10 or so rooted macs. I mean, I could rm them, but I'd never do that, that's mean. And I wouldn't feel good about using the camera, even though the computers are in public, it's icky. Perhaps a DoS? There's nobody that I dislike enough for that. I think I'd be so rich if I wasn't s…

Don't be an ass.

Re: OS X sudoers exploit found in the wild

#26

I'm not sure who makes me more cranky: Apple for apparently sitting on the fix, or Stefan Esser for flinging the vulnerability into the breeze for anyone to catch. Esser has his reasons - "Short reminder: Europeans are not allowed to disclose vulns privately to a foreign company like Apple without registering dual-use export"[1] - but it's hard to believe he couldn't have told them anonymously. Disclosures make caree…

> Esser has his reasons - "Short reminder: Europeans are not allowed to disclose vulns privately to a foreign company like Apple without registering dual-use export"

I don't think of this as strictly career advancement. I think he is making an important legal and political point. If there were never serious issues while we operate under said laws, then they would never be changed or subject to question either.

Re: OS X sudoers exploit found in the wild

#27

I'm not sure who makes me more cranky: Apple for apparently sitting on the fix, or Stefan Esser for flinging the vulnerability into the breeze for anyone to catch. Esser has his reasons - "Short reminder: Europeans are not allowed to disclose vulns privately to a foreign company like Apple without registering dual-use export"[1] - but it's hard to believe he couldn't have told them anonymously. Disclosures make caree…

How can you be mad at Esser? He didn't put the bug there. He has nothing to do with this.

Re: OS X sudoers exploit found in the wild

#28
post #6

Isn't this the time when Mac App Store supposed to shine? When they found something that's dodgy and linked to a company that has apps on App Store, can't they just turn on the kill switch? That way the malware won't have anywhere to direct the users to.

> When they found something that's dodgy and linked to a company that has apps on App Store, can't they just turn on the kill switch? That way the malware won't have anywhere to direct the users to.

If Apple did this you could take down any app from the App Store by writing some malware and making it "advertise" the App Store listing.

Re: OS X sudoers exploit found in the wild

#29
post #24

Earlier quoted context omitted.

It's not clear whether this "adware installer" is signed by a developer cert. I'm gonna guess it isn't, which means under the default settings, if a user double-clicks it to execute it, they'll be presented with a message saying that the app can't be run because it's "from an unknown developer" and the current settings disallow it. The user can get around that by right-clicking it and choosing "Open" (or switching Ga…

One could easily make an "app" which just runs a shell script with this exploit - no code signing needed.

And users attempting to run it would encounter the things I mentioned above, so I'm not sure what you're getting at.

Re: OS X sudoers exploit found in the wild

#30
post #24

Earlier quoted context omitted.

It's not clear whether this "adware installer" is signed by a developer cert. I'm gonna guess it isn't, which means under the default settings, if a user double-clicks it to execute it, they'll be presented with a message saying that the app can't be run because it's "from an unknown developer" and the current settings disallow it. The user can get around that by right-clicking it and choosing "Open" (or switching Ga…

One could easily make an "app" which just runs a shell script with this exploit - no code signing needed.

Anything with a .app wrapper needs to be signed. It doesn't matter if the main exe is a binary or a script.
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