Bug 1493435 - (CVE-2017-12192) CVE-2017-12192 kernel: NULL pointer dereference due to KEYCTL_READ on negative key
CVE-2017-12192 kernel: NULL pointer dereference due to KEYCTL_READ on negativ...
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=20170918,repor...
: Security
Depends On: 1498366 1498368 1493436 1498365 1498367 1498369 1498370 1498371 1498372 1498373
Blocks: 1493438
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Reported: 2017-09-20 03:59 EDT by Andrej Nemec
Modified: 2018-02-07 18:38 EST (History)
51 users (show)

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Fixed In Version:
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Doc Text:
A vulnerability was found in the Key Management sub component of the Linux kernel, where when trying to issue a KEYTCL_READ on a negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0151 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-01-25 11:17:48 EST

  None (edit)
Description Andrej Nemec 2017-09-20 03:59:17 EDT
A vulnerability in the Key Management sub component was found in the Linux kernel. Trying to KEYTCL_READ on negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel.

References:

https://lkml.org/lkml/2017/9/18/764

http://seclists.org/oss-sec/2017/q4/63

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
Comment 1 Andrej Nemec 2017-09-20 04:00:25 EDT
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1493436]
Comment 3 Wade Mealing 2017-10-04 02:59:54 EDT
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2.

Future Linux kernel updates for the respective releases will address this issue.
Comment 7 Wade Mealing 2017-10-16 01:25:13 EDT
External References:

http://seclists.org/oss-sec/2017/q4/63
Comment 12 errata-xmlrpc 2018-01-25 06:25:53 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0151 https://access.redhat.com/errata/RHSA-2018:0151

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