From: Vasiliy Kulikov <segoon@openwall.com>
To: linux-kernel@vger.kernel.org
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Al Viro <viro@zeniv.linux.org.uk>,
David Rientjes <rientjes@google.com>,
Stephen Wilson <wilsons@start.ca>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
security@kernel.org, Eric Paris <eparis@redhat.com>,
Solar Designer <solar@openwall.com>
Subject: [PATCH 0/2] restrict statistics information to user
Date: Fri, 24 Jun 2011 16:07:54 +0400 [thread overview]
Message-ID: <1308917274-4701-1-git-send-email-segoon@openwall.com> (raw)
taskstats and /proc/PID/io may be used for gathering private
information. E.g. for openssh and vsftpd daemons wchars/rchars may be
used to learn the precise password length (pass_len = w_chars - CONST).
Restrict it to user.
The simplified proof learning whether ~*/.ssh/authorized_keys file
exists is posted here:
http://www.openwall.com/lists/oss-security/2011/06/21/12
Vasiliy Kulikov (2):
proc: restrict access to /proc/PID/io
taskstats: restrict access to user
fs/proc/base.c | 7 +++++--
kernel/taskstats.c | 23 ++++++++++++++++++++++-
2 files changed, 27 insertions(+), 3 deletions(-)
reply other threads:[~2011-06-24 12:08 UTC|newest]
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