oss-sec mailing list archives
Re: OpenSSH key blacklisting
From: Solar Designer <solar () openwall com>
Date: Sat, 17 May 2008 01:50:00 +0400
On Fri, May 16, 2008 at 09:36:06PM +0200, Robert Buchholz wrote:
Gentoo is discussing the feature in bug #221759 [1]. Until now, I have not heard a reaction to the patch from our OpenSSH maintainers, so I cannot judge on the technical side of the inclusion.
Thanks for the "bug" reference. FWIW, the shell script in this comment is vulnerable itself, in more than one way: http://bugs.gentoo.org/show_bug.cgi?id=221759#c9 For example, it lets a user have any other user's or root's authorized_keys removed, by replacing .ssh with a symlink to someone else's .ssh directory. It's just bad practice to access users' files as root (or as another user); this is difficult to do safely. Also, it misses authorized_keys2.
I assume whichever version has the acceptance of the OpenSSH upstream is what most of us would be willing to go with. Did you discuss either blacklist format with them already?
Yes, very briefly. They don't intend to implement key blacklisting. I suspect that a worm might change this, though. ;-)
Personally, I would like to see the feature ported to our distribution sooner than later, but neither at the cost of maintaining patchsets for the rest of existance, nor with high transition cost once upstream accepts another format.
Well, this is difficult to predict correctly. Alexander
Current thread:
- OpenSSH key blacklisting Solar Designer (May 16)
- Re: OpenSSH key blacklisting Craig Edwards (Brain) (May 16)
- Re: OpenSSH key blacklisting Solar Designer (May 16)
- Re: OpenSSH key blacklisting Vincent Danen (May 16)
- Re: OpenSSH key blacklisting Robert Buchholz (May 16)
- Re: OpenSSH key blacklisting Solar Designer (May 16)
- Re: OpenSSH key blacklisting Robert Buchholz (May 17)
- Re: OpenSSH key blacklisting Solar Designer (May 17)
- Re: OpenSSH key blacklisting Robert Buchholz (May 17)
- Re: OpenSSH key blacklisting Solar Designer (May 17)
- Re: OpenSSH key blacklisting Kees Cook (May 18)
- Re: OpenSSH key blacklisting Solar Designer (May 18)
- Re: OpenSSH key blacklisting Kees Cook (May 19)
- Re: OpenSSH key blacklisting Solar Designer (May 16)
- Re: OpenSSH key blacklisting Kees Cook (May 19)
- Re: OpenSSH key blacklisting Craig Edwards (Brain) (May 16)
- Re: OpenSSH key blacklisting Kees Cook (May 18)
- Re: OpenSSH key blacklisting Matthias Andree (May 20)