Bug 1456388 - (CVE-2017-9242) CVE-2017-9242 kernel: Incorrect overwrite check in __ip6_append_data()
CVE-2017-9242 kernel: Incorrect overwrite check in __ip6_append_data()
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170519,repor...
: Security
Depends On: 1456389 1453057 1459239
Blocks: 1456390
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Reported: 2017-05-29 05:59 EDT by Adam Mariš
Modified: 2017-08-02 03:57 EDT (History)
34 users (show)

See Also:
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.
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Description Adam Mariš 2017-05-29 05:59:03 EDT
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 06:00:30 EDT
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1456389]
Comment 5 Vladis Dronov 2017-06-06 11:19:31 EDT
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 15:17:21 EDT
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 03:57:37 EDT
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

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