Date: Fri, 21 Sep 2012 13:30:48 -0600 From: Kurt Seifried <kseifried@...hat.com> To: oss-security@...ts.openwall.com CC: Michael Gilbert <mgilbert@...ian.org> Subject: Re: Re: CVE request(?): gpg: improper file permssions set when en/de-crypting files -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/21/2012 12:27 PM, Michael Gilbert wrote: > On Fri, Sep 21, 2012 at 2:18 PM, Kurt Seifried > <kseifried@...hat.com> wrote: >>> Any security weakness can qualify for the E in CVE. Really >>> the point >> >> No, security vulnerabilities qualify, security hardening does >> not necessarily qualify. > > Again E is for exposure, not vulnerability. > >> In this case GnuPG respects umask. We can't assign a CVE for >> every single program that has potentially sensitive output and >> fails to ensure that the output is mode 0600 or whatever (what >> about extended access controls?). Some programs choose to enforce >> permissions within themselves (e.g. OpenSSH and key based >> authentication), but generally speaking makeing sure a program >> with potentially sensitive output is safe is the job of the >> system configuration, and you have several options: > > Think about it this way. I open a file with mode 600 in vim, edit > it, save it, and find it with mode 644? That would be an exposure, > would it not? Not if it respects your umask. If you want privacy set your umask correctly. Programs can't know what they're supposed to do unless you tell them. And we tell the system using umask. > Again, about as minor as you could get, but its still an E. I'm confused. It's not exposed unless you configure umask wrong and run this in a public viewable directory. If you want a CVE for every single program that doesn't ensure it's (potentially sensitive) output is mode 0600 than that's basically, well, all the programs on a system. > Best wishes, Mike > - -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iQIcBAEBAgAGBQJQXMBoAAoJEBYNRVNeJnmT0JsQANftNC0hArRkLz/enBNQ9XLs 0ZJQRLZM5mh2h82hr9rvhpOAmmAPBQ/+mVsmDVs9MicPk3Vu7xyPkxLuzbd4L7C4 I99nOZ4PGuGccN9+r6JOLg2JqKRKJIBPfxsfEIPdsQM7It7bGFkAr1w/ylEefnSB OOZREhu3NY7xM0ydbReQT7CLS3xiKbiRCi6qOXCa4mG/wVff9ZbxeVgvf4ZBPXby QW54CevK7KScUuHZ1UFniJdd++ockxnCDAQ5y7d6yQufECmtvPc+xPdj5U044xYm h4oiWB5HVxJ0d9Ca1shOVcl5f5pEfxzzO2YiyyamwB4eEkMttg+pYVK0mw5BzFLC iOlZFTTAZyFSremCgCzfa/tvOcSNr7Irhj5IFCV/J3ZwbzbmPuXR+xCn4Zs1pIez xwXtqfXlML5Ptr4KgKc3hWjWyP1FGtzHcV3+d61ZPRzTJ0Y1G55zGch30m8B527A QNXZ0czh/31Aoz2H5FyfGJYHFTq9FVTds/FuCMdPDL43zUtEq/OXTtEAdzY3Ul8H p6ZYhQx9nsKwX9p76XFKrXPnBMY6bP8WRspIF5TAIIuGhTWn/afcMZBkxrpBQHaL 7SST84BMCfxWwanBZnjD9n+r0eVIfOgSe5ywBte7O0ZADjFO44XAt4nFnUMzwMOQ n2f3p5kLwpbVhX7rjC5Y =K+6A -----END PGP SIGNATURE-----
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