diff options
author | Vasiliy Kulikov <segoon@openwall.com> | 2011-06-24 16:08:38 +0400 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-03 12:42:51 -0700 |
commit | 30f311db2bee9f2e0373619dee1acd6182819ee1 (patch) | |
tree | ed3bc6912a5dabd756f01e5cbafe49259cca1b2f /scripts/patch-kernel | |
parent | 64b1641d7c7b9a65619522a11ce4abe9b8fd2d9c (diff) |
proc: restrict access to /proc/PID/io
commit 1d1221f375c94ef961ba8574ac4f85c8870ddd51 upstream.
/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. Restrict it to processes being able to ptrace
the target process.
ptrace_may_access() is needed to prevent keeping open file descriptor of
"io" file, executing setuid binary and gathering io information of the
setuid'ed process.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions