Bug 1470659 (CVE-2017-11176) - CVE-2017-11176 kernel: Use-after-free in sys_mq_notify()
Summary: CVE-2017-11176 kernel: Use-after-free in sys_mq_notify()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-11176
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: 1470660 1476122 1476123 1476124 1476125 1476126 1476127 1476128 1476129 1476130 1476131
Blocks: 1470663
TreeView+ depends on / blocked
 
Reported: 2017-07-13 12:13 UTC by Adam Mariš
Modified: 2021-03-11 15:26 UTC (History)
38 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Netlink functionality of the Linux kernel networking subsystem. Due to the insufficient cleanup in the mq_notify function, a local attacker could potentially use this flaw to escalate their privileges on the system.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:16:25 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2918 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 17:24:24 UTC
Red Hat Product Errata RHSA-2017:2930 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2017-10-19 18:47:35 UTC
Red Hat Product Errata RHSA-2017:2931 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 18:48:35 UTC
Red Hat Product Errata RHSA-2018:0169 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-01-25 16:22:33 UTC
Red Hat Product Errata RHSA-2018:3822 0 None None None 2018-12-12 14:53:46 UTC

Description Adam Mariš 2017-07-13 12:13:50 UTC 
The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to possibly cause a situation where a value may be used after being freed (Use after free) which may lead to memory corruption or other unspecified other impact.

Upstream patch:

https://github.com/torvalds/linux/commit/f991af3daabaecff34684fd51fac80319d1baad1

Mitre advisory: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11176

What is use after free: https://access.redhat.com/use-after-free-flaw-type
Comment 1 Adam Mariš 2017-07-13 12:14:42 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1470660]
Comment 2 Fedora Update System 2017-07-23 22:55:03 UTC 
kernel-4.11.11-200.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 Eric Christensen 2017-10-10 18:44:42 UTC 
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6,7 and MRG-2.  Future Linux kernel updates for the respective releases may address this issue.
Comment 8 errata-xmlrpc 2017-10-19 13:26:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2918 https://access.redhat.com/errata/RHSA-2017:2918
Comment 9 errata-xmlrpc 2017-10-19 15:05:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2930 https://access.redhat.com/errata/RHSA-2017:2930
Comment 10 errata-xmlrpc 2017-10-19 15:09:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2931 https://access.redhat.com/errata/RHSA-2017:2931
Comment 11 errata-xmlrpc 2018-01-25 11:31:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:0169 https://access.redhat.com/errata/RHSA-2018:0169
Comment 13 errata-xmlrpc 2018-12-12 14:53:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5 Extended Lifecycle Support

Via RHSA-2018:3822 https://access.redhat.com/errata/RHSA-2018:3822
Note You need to log in before you can comment on or make changes to this bug.