Bug 1412210 (CVE-2016-10088) - CVE-2016-10088 kernel: Use after free in SCSI generic device interface (CVE-2016-9576 regression)
Summary: CVE-2016-10088 kernel: Use after free in SCSI generic device interface (CVE-2...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-10088
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1403146 1414823 1414834 1414835 1414836 1414837
Blocks: 1403147
TreeView+ depends on / blocked
 
Reported: 2017-01-11 14:22 UTC by Andrej Nemec
Modified: 2019-09-29 14:03 UTC (History)
30 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that the fix for CVE-2016-9576 was incomplete: the Linux kernel's sg implementation did not properly restrict write operations in situations where the KERNEL_DS option is set. A local attacker to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging write access to a /dev/sg device.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:05:18 UTC


Attachments (Terms of Use)


Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2017:3163 normal SHIPPED_LIVE new packages: kernel-alt 2017-11-09 14:59:25 UTC
Red Hat Product Errata RHSA-2017:0817 normal SHIPPED_LIVE Moderate: kernel security, bug fix, and enhancement update 2017-03-21 13:06:51 UTC
Red Hat Product Errata RHSA-2017:1842 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 18:22:09 UTC
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 18:13:37 UTC
Red Hat Product Errata RHSA-2017:2669 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-07 00:36:52 UTC

Description Andrej Nemec 2017-01-11 14:22:30 UTC
The sg implementation in the Linux kernel through 4.9 does not properly restrict write operations in situations where the KERNEL_DS option is set, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device, related to block/bsg.c and drivers/scsi/sg.c. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9576.

References:

http://seclists.org/oss-sec/2016/q4/779

Upstream patch:

https://git.kernel.org/linus/128394eff343fc6d2f32172f03e24829539c5835

This is an additional fix for CVE-2016-9576, see:

https://bugzilla.redhat.com/show_bug.cgi?id=1403145

Comment 7 Vladis Dronov 2017-01-19 15:22:50 UTC
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 as the code which can trigger the flaw is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.

Comment 10 errata-xmlrpc 2017-03-21 13:24:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0817 https://rhn.redhat.com/errata/RHSA-2017-0817.html

Comment 12 errata-xmlrpc 2017-08-01 19:12:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077

Comment 13 errata-xmlrpc 2017-08-02 07:52:11 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842

Comment 14 errata-xmlrpc 2017-09-06 20:39:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669


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