[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 25 Feb 2011 09:03:49 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: Kees Cook <kees@...ntu.com>
Subject: Re: CVE request: kernel: /sys/kernel/debug/acpi/custom_method
can bypass module restrictions
On 02/25/2011 08:32 AM, Kees Cook wrote:
> Hi,
>
> While CVE-2010-4347 covers the unprivileged to fully privileged escalation
> issue, this interface still allows an unprivileged root user to gain
> back all their capabilities.
>
> Having a system with acpi and debugfs built into the kernel allows
> a uid=0 user (without capabilities, e.g. in containers) to write to
> arbitrary kernel memory, likely resulting in escalated capability
> privileges[1], or unlocking an otherwise modules-disabled kernel by
> changing /proc/sys/kernel/modules_disabled back to 0.
Use CVE-2011-1021.
Eugene
--
Eugene Teo / 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.
