Bug 1576419 (CVE-2018-1130) - CVE-2018-1130 kernel: a null pointer dereference in net/dccp/output.c:dccp_write_xmit() leads to a system crash
Summary: CVE-2018-1130 kernel: a null pointer dereference in net/dccp/output.c:dccp_wr...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-1130
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: 1571268 1576586 1576588 1576589 1740291 1740292 1740293 1740294
Blocks: 1571429
TreeView+ depends on / blocked
 
Reported: 2018-05-09 12:17 UTC by Vladis Dronov
Modified: 2021-12-10 16:07 UTC (History)
21 users (show)

Fixed In Version: kernel 4.16-rc7
Doc Type: If docs needed, set a value
Doc Text:
A null pointer dereference in dccp_write_xmit() function in net/dccp/output.c in the Linux kernel allows a local user to cause a denial of service by a number of certain crafted system calls.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:22:29 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:1854 0 None None None 2018-06-19 04:48:45 UTC
Red Hat Product Errata RHSA-2018:3083 0 None None None 2018-10-30 07:33:49 UTC
Red Hat Product Errata RHSA-2018:3096 0 None None None 2018-10-30 07:40:08 UTC

Description Vladis Dronov 2018-05-09 12:17:01 UTC 
A null pointer dereference in dccp_write_xmit() function in net/dccp/output.c in the Linux kernel allows a local user to cause a denial of service by a number of certain crafted system calls.

References:

https://syzkaller.appspot.com/bug?id=833568de043e0909b2aeaef7be136db39d21ba94

https://marc.info/?t=152036611500003&r=1&w=2

http://seclists.org/oss-sec/2018/q2/100

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f93df79aeefc3add4e4b31a752600f834236e2
Comment 2 Vladis Dronov 2018-05-09 12:34:06 UTC 
Acknowledgments:

Name: Evgenii Shatokhin (Virtuozzo Team)
Comment 3 Justin M. Forbes 2018-05-09 13:08:47 UTC 
This was fixed for Fedora with the 4.16 rebases.
Comment 7 Vladis Dronov 2018-05-09 21:21:13 UTC 
Note: 

DCCP modules were blacklisted by default from auto-loading since RHEL-7.5 out of stability and security concerns. This means they won't be automatically loaded when requested by the socket layer - hence the need to load them manually.

Nevertheless, as the DCCP modules themselves are present and could be loaded, future Linux kernel updates for RHEL-6 and RHEL-7 may address this issue.
Comment 8 errata-xmlrpc 2018-06-19 04:48:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854
Comment 9 errata-xmlrpc 2018-10-30 07:33:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083
Comment 10 errata-xmlrpc 2018-10-30 07:39:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096
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