Date: Mon, 6 Jun 2011 16:39:06 -0400 From: Michael Gilbert <michael.s.gilbert@...il.com> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org> Subject: Re: CVE request -- coreutils -- tty hijacking possible in "su" via TIOCSTI ioctl On Mon, Jun 6, 2011 at 1:22 PM, Josh Bressers wrote: > ----- Original Message ----- >> Hello Josh, Steve, vendors, >> >> based on Debian BTS report: >>  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628843 >> (first CVE-2011-XXYY required for Debian case) >> >> looked more into original report: >>  https://bugzilla.redhat.com/show_bug.cgi?id=173008 >> >> and the first paragraph of  suggests: >> "When starting a program via "su - user -c program" the user session >> can escape to the parent session by using the TIOCSTI ioctl to push >> characters into the input buffer. This allows for example a non-root >> session to push "chmod 666 /etc/shadow" or similarly bad commands into >> the input buffer such that after the end of the session they are >> executed." >> >> this should get a CVE-2005-YYZZ CVE id. >> > > This really shouldn't get a CVE id. It's well known, and sadly not easy to > fix. There are more details in this bug: > https://bugzilla.redhat.com/show_bug.cgi?id=479145 > > I would classify this as an administration issue, not a flaw in su or sudo. > If you're running arbitrary things, you're in far more trouble than this. > > I'm happy to let MITRE overrule me. There is a real exposure here (although somewhat minor), and there are existing patches that clearly bound/fix the problem, so it should get an id (in my opinion of course). Best wishes, Mike
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