linux-kernel - Re: New Security Features, Please Comment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 03 Dec 2008 12:41:40 +1030
From:	David Newall <davidn@...idnewall.com>
To:	Geoffrey McRae <geoff@...idhost.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: New Security Features, Please Comment

Geoffrey McRae wrote:
> But once this set is introduced a HTTP server could be written that uses
> forked children to handle requests, that have their identity swtiched
> before doing any work, including parsing CGI scripts.

But a child could be one user the first time it does work, and another
user the next time.  What prevents the child from opening a file while
the first user, and reading or writing it while the second?  That's
exactly what you don't want to permit.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/