From: Paolo Bonzini <pbonzini@redhat.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linux-kernel@vger.kernel.org, Tejun Heo <tj@kernel.org>,
"James E.J. Bottomley" <JBottomley@parallels.com>,
linux-scsi@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Subject: PING^3 Re: [PATCH v2 00/14] Corrections and customization of the SG_IO command whitelist (CVE-2012-4542)
Date: Thu, 04 Apr 2013 20:18:38 +0200 [thread overview]
Message-ID: <515DC3FE.1010405@redhat.com> (raw)
In-Reply-To: <514CDB6F.9030505@redhat.com>
Il 22/03/2013 23:30, Paolo Bonzini ha scritto:
> Il 20/02/2013 17:12, Paolo Bonzini ha scritto:
>> Il 06/02/2013 16:15, Paolo Bonzini ha scritto:
>>> This series regards the whitelist that is used for the SG_IO ioctl. This
>>> whitelist has three problems:
>>>
>>> * the bitmap of allowed commands is designed for MMC devices (roughly,
>>> "play/burn CDs without requiring root") but some opcodes overlap across SCSI
>>> device classes and have different meanings for different classes.
>>>
>>> * also because the bitmap of allowed commands is designed for MMC devices
>>> only, some commands are missing even though they are generally useful and
>>> not insecure. At least not more insecure than anything else you can
>>> do if you have access to /dev/sdX or /dev/stX nodes.
>>>
>>> * the whitelist can be disabled per-process but not per-disk. In addition,
>>> the required capability (CAP_SYS_RAWIO) gives access to a range of other
>>> resources, enough to make it insecure.
>>>
>>> The series corrects these problems. Patches 1-4 solve the first problem,
>>> which also has an assigned CVE, by using different bitmaps for the various
>>> device classes. Patches 5-11 solve the second by adding more commands
>>> to the bitmaps. Patches 12 and 13 solve the third, and were already
>>> posted but ignored by the maintainers despite multiple pings.
>>>
>>> Note: checkpatch hates the formatting of the command table. I know about this,
>>> and ensured that there are no errors in the rest of the code. The current
>>> formatting is IMHO quite handy, and roughly based on the files available
>>> from the SCSI standard body.
>>>
>>> Ok for the next merge window?
>>>
>>> Paolo
>>>
>>> v1->v2: remove 2 MMC commands and 6 SBC commands (see patches 6 and 9
>>> for details). Added patch 14 and added a few more scanner
>>> commands based on SANE (scanners are not whitelisted by default,
>>> also were not in v1, but this makes it possible to opt into the
>>> whitelist out of paranoia). Removed C++ comments. Removed the
>>> large #if 0'd list of commands that the kernel does not pass
>>> though. Marked blk_set_cmd_filter_defaults as __init.
>>
>> Ping...
>>
>> Jens/James, is anyone going to pick this up for 3.9?
>
> Another month has passed, Ping^2...
Ping^3, any hope for 3.10?
Paolo
>
> Paolo
>
>> Paolo
>>
>>>
>>> Paolo Bonzini (14):
>>> sg_io: pass request_queue to blk_verify_command
>>> sg_io: reorganize list of allowed commands
>>> sg_io: use different default filters for each device class
>>> sg_io: resolve conflicts between commands assigned to multiple
>>> classes (CVE-2012-4542)
>>> sg_io: whitelist a few more commands for rare & obsolete device types
>>> sg_io: whitelist another command for multimedia devices
>>> sg_io: whitelist a few more commands for media changers
>>> sg_io: whitelist a few more commands for tapes
>>> sg_io: whitelist a few more commands for disks
>>> sg_io: whitelist a few obsolete commands
>>> sg_io: mark blk_set_cmd_filter_defaults as __init
>>> sg_io: remove remnants of sysfs SG_IO filters
>>> sg_io: introduce unpriv_sgio queue flag
>>> sg_io: use unpriv_sgio to disable whitelisting for scanners
>>>
>>> Documentation/block/queue-sysfs.txt | 8 +
>>> block/blk-sysfs.c | 33 +++
>>> block/bsg.c | 2 +-
>>> block/scsi_ioctl.c | 369 ++++++++++++++++++++++++++---------
>>> drivers/scsi/scsi_scan.c | 14 ++-
>>> drivers/scsi/sg.c | 6 +-
>>> include/linux/blkdev.h | 8 +-
>>> include/linux/genhd.h | 9 -
>>> include/scsi/scsi.h | 3 +
>>> 9 files changed, 344 insertions(+), 108 deletions(-)
>>>
>>
>
next prev parent reply other threads:[~2013-04-04 18:18 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-06 15:15 [PATCH v2 00/14] Corrections and customization of the SG_IO command whitelist (CVE-2012-4542) Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 01/14] sg_io: pass request_queue to blk_verify_command Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 02/14] sg_io: reorganize list of allowed commands Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 03/14] sg_io: use different default filters for each device class Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 04/14] sg_io: resolve conflicts between commands assigned to multiple classes (CVE-2012-4542) Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 05/14] sg_io: whitelist a few more commands for rare & obsolete device types Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 06/14] sg_io: whitelist another command for multimedia devices Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 07/14] sg_io: whitelist a few more commands for media changers Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 08/14] sg_io: whitelist a few more commands for tapes Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 09/14] sg_io: whitelist a few more commands for disks Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 10/14] sg_io: whitelist a few obsolete commands Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 11/14] sg_io: mark blk_set_cmd_filter_defaults as __init Paolo Bonzini
2013-02-06 15:15 ` [PATCH v2 12/14] sg_io: remove remnants of sysfs SG_IO filters Paolo Bonzini
2013-02-06 15:16 ` [PATCH v2 13/14] sg_io: introduce unpriv_sgio queue flag Paolo Bonzini
2013-02-06 15:16 ` [PATCH v2 14/14] sg_io: use unpriv_sgio to disable whitelisting for scanners Paolo Bonzini
2013-02-13 8:32 ` [PATCH v2 00/14] Corrections and customization of the SG_IO command whitelist (CVE-2012-4542) Paolo Bonzini
2013-02-13 15:35 ` Douglas Gilbert
2013-02-13 15:48 ` Paolo Bonzini
2013-02-20 16:12 ` Paolo Bonzini
2013-03-22 22:30 ` PING^2 " Paolo Bonzini
2013-04-04 18:18 ` Paolo Bonzini [this message]
2013-04-17 12:26 ` PING^4 aka The Jon Corbet Effect " Paolo Bonzini
2013-04-27 13:31 ` PING^5 aka New ways to attract attentions " Paolo Bonzini
2013-05-06 20:43 ` PING^6 " Paolo Bonzini
2013-05-22 6:35 ` PING^7 (was Re: [PATCH v2 00/14] Corrections and customization of the SG_IO command whitelist (CVE-2012-4542)) Paolo Bonzini
2013-05-22 9:32 ` Tejun Heo
2013-05-22 9:53 ` Paolo Bonzini
2013-05-22 10:02 ` Tejun Heo
2013-05-22 10:23 ` Paolo Bonzini
2013-05-22 12:07 ` James Bottomley
2013-05-22 14:07 ` Paolo Bonzini
2013-05-22 16:31 ` Paolo Bonzini
2013-05-22 13:41 ` Tejun Heo
2013-05-22 14:12 ` Paolo Bonzini
2013-05-22 14:30 ` Tejun Heo
2013-05-22 15:00 ` Paolo Bonzini
2013-05-22 19:30 ` Tejun Heo
2013-05-22 21:18 ` Paolo Bonzini
2013-05-22 22:17 ` Tejun Heo
2013-05-23 0:54 ` Tejun Heo
2013-05-23 7:45 ` Paolo Bonzini
2013-05-23 9:02 ` Tejun Heo
2013-05-23 9:47 ` Paolo Bonzini
2013-05-24 1:44 ` Tejun Heo
2013-05-24 7:13 ` Paolo Bonzini
2013-05-24 8:02 ` Tejun Heo
2013-05-24 8:31 ` Paolo Bonzini
2013-05-24 9:07 ` Tejun Heo
2013-05-24 9:45 ` Paolo Bonzini
2013-05-24 22:20 ` Tejun Heo
2013-05-25 4:35 ` James Bottomley
2013-05-25 5:27 ` Christoph Hellwig
2013-05-25 7:05 ` Paolo Bonzini
2013-05-25 7:11 ` Christoph Hellwig
2013-05-25 7:21 ` Paolo Bonzini
2013-06-21 11:57 ` Christoph Hellwig
2013-05-25 8:37 ` Tejun Heo
2013-05-25 11:14 ` Paolo Bonzini
2013-05-25 12:48 ` Tejun Heo
2013-05-25 12:56 ` Paolo Bonzini
2013-05-22 15:03 ` Theodore Ts'o
2013-05-22 15:53 ` Paolo Bonzini
2013-05-22 16:32 ` Martin K. Petersen
2013-05-22 17:00 ` Paolo Bonzini
2013-05-22 18:11 ` Theodore Ts'o
2013-05-22 19:37 ` Paolo Bonzini
2013-05-22 20:19 ` Theodore Ts'o
2013-05-22 20:36 ` Paolo Bonzini
2013-05-25 3:54 ` Vladislav Bolkhovitin
2013-05-28 20:25 ` Martin K. Petersen
2013-05-29 6:12 ` Vladislav Bolkhovitin
2013-05-22 20:39 ` Tejun Heo
2013-05-22 21:12 ` Paolo Bonzini
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