Bug 1456388 (CVE-2017-9242) - CVE-2017-9242 kernel: Incorrect overwrite check in __ip6_append_data()
Summary: CVE-2017-9242 kernel: Incorrect overwrite check in __ip6_append_data()
Status: NEW
Alias: CVE-2017-9242
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
(Show other bugs)
Version: unspecified
Hardware: All Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20170519,repor...
Keywords: Security
Depends On: 1453057 1456389 1459239
Blocks: 1456390
TreeView+ depends on / blocked
 
Reported: 2017-05-29 09:59 UTC by Adam Mariš
Modified: 2018-08-28 22:17 UTC (History)
31 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.
Story Points: ---
Clone Of:
Environment:
Last Closed:
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
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

Description Adam Mariš 2017-05-29 09:59:03 UTC
The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.

References:

https://patchwork.ozlabs.org/patch/764880/

https://bugzilla.novell.com/show_bug.cgi?id=1041431

Upstream fix:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=232cd35d0804cc241eb887bb8d4d9b3b9881c64a

Comment 1 Adam Mariš 2017-05-29 10:00:30 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1456389]

Comment 5 Vladis Dronov 2017-06-06 15:19:31 UTC
Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.

Comment 6 errata-xmlrpc 2017-08-01 19:17:21 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 7 errata-xmlrpc 2017-08-02 07:57:37 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 8 Justin M. Forbes 2018-01-29 17:30:44 UTC
This was fixed for fedora with the 4.11.4 stable updates.


Note You need to log in before you can comment on or make changes to this bug.