[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <4EA826AC.8060808@redhat.com>
Date: Wed, 26 Oct 2011 09:26:36 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request -- kernel: sysctl: restrict write
access to dmesg_restrict
On 10/26/2011 09:16 AM, Petr Matousek wrote:
> When dmesg_restrict is set to 1 CAP_SYS_ADMIN is needed to read the
> kernel ring buffer. But a root user without CAP_SYS_ADMIN is able
> to reset dmesg_restrict to 0.
>
> This is an issue when e.g. LXC (Linux Containers) are used and complete
> user space is running without CAP_SYS_ADMIN. A unprivileged and jailed
> root user can bypass the dmesg_restrict protection.
>
> Introduced by:
> eaf06b241b091357e72b76863ba16e89610d31bd
>
> Fixed by:
> bfdc0b497faa82a0ba2f9dddcf109231dd519fcc
>
> Thanks,
Please use CVE-2011-4080 for this issue.
--
-Kurt Seifried / Red Hat Security Response Team
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
