Bug 1393904 (CVE-2016-8645) - CVE-2016-8645 kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c
Summary: CVE-2016-8645 kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-8645
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: 1393908 1395256 1400217 1400218 1400220
Blocks: 1390621
TreeView+ depends on / blocked
 
Reported: 2016-11-10 15:13 UTC by Vladis Dronov
Modified: 2021-02-17 03:03 UTC (History)
32 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was discovered that the Linux kernel since 3.6-rc1 with 'net.ipv4.tcp_fastopen' set to 1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:01:57 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 0 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 0 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 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-07 00:36:52 UTC

Description Vladis Dronov 2016-11-10 15:13:32 UTC 
It was discovered that the Linux kernel since, at least, v4.0 till v4.9-rc1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash.

Discussion at stable@:

http://www.spinics.net/lists/stable/msg150470.html

Discussion at netdev@:

http://www.spinics.net/lists/netdev/msg403701.html

http://marc.info/?l=linux-netdev&m=147878925724283&w=2

http://marc.info/?t=147878927800005&r=1&w=2 # the whole thread

A proposed patch:

http://marc.info/?l=linux-netdev&m=147881188232264&w=2 # patch v1

http://marc.info/?t=147881111500001&r=1&w=2&n=2 # the whole thread

http://marc.info/?l=linux-netdev&m=147881236332369&w=2 # patch v2

http://marc.info/?t=147881240700003&r=1&w=2 # the whole thread

http://www.spinics.net/lists/netdev/msg403787.html

http://www.spinics.net/lists/netdev/msg403789.html # patch v2

An upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ac6e780070e30e4c35bd395acfe9191e6268bdd3

CVE-ID assignment:

http://seclists.org/oss-sec/2016/q4/397
Comment 1 Vladis Dronov 2016-11-10 15:14:00 UTC 
Acknowledgments:

Name: Marco Grassi
Comment 2 Vladis Dronov 2016-11-10 15:15:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1393908]
Comment 3 Vladis Dronov 2016-11-11 12:55:06 UTC 
CVE-2016-8645 was assigned to this flaw internally by the Red Hat, please, use this CVE-ID in communications regarding this flaw:

http://seclists.org/oss-sec/2016/q4/397
Comment 5 Vladis Dronov 2016-11-15 14:12:22 UTC 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 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 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
Comment 10 errata-xmlrpc 2017-08-01 19:10:13 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 11 errata-xmlrpc 2017-08-02 07:50:14 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 12 errata-xmlrpc 2017-09-06 20:38:34 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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