Date: Tue, 4 Jul 2017 18:07:13 +0300 From: Igor Seletskiy <i@...udlinux.com> To: oss-security@...ts.openwall.com Subject: Re: linux-distros list membership application - CloudLinux > > > > On Sun, Jul 02, 2017 at 05:29:25PM +0300, Igor Seletskiy wrote: > > We typically have to patch local privilege escalations in kernel asap as > > our customers are easily rooted using this type of vulnerabilities > (anyone > > can buy website or hack old wordpress instance & run any code). > > This may be a reason for you to harden your distro's userland against > local privilege escalations as well, such as by adopting the > owl-alt-sanitize-env glibc hardening patch maintained by ALT Linux: > > http://git.altlinux.org/gears/g/..git?p=glibc.git;a=commitdiff;h=496059f2 Thank you, we will analyze it / test how well it works with 3rd party software. > > > and getting rid of most or all world-accessible SUID programs, which is > do-able like we have demonstrated with Owl. This shouldn't be > unreasonably hard to implement and maintain in a fork of RHEL, although > obviously you'll end up with more packages (including some core ones) > that would no longer be mere rebuilds of RHEL's. > All the web applications, end users ssh sessions and cron jobs are executed in namespaced / chrooted environment with no SUID files accessible already. We cannot completely get rid of SUID scripts as they are used by 3rd party software (like cPanel/Plesk) that is used on most of customer's servers. It is not perfect, but the best we were able to do so far. Thank you for the advise, Igor.
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