CVE-2017-12193

Impact:
Moderate
Public Date:
2017-11-02
CWE:
CWE-476
Bugzilla:
1501215: CVE-2017-12193 kernel: Null pointer dereference due to incorrect node-splitting in assoc_array implementation
A flaw was found in the Linux kernel's implementation of associative arrays introduced in 3.13. This functionality was backported to the 3.10 kernels in Red Hat Enterprise Linux 7. The flaw involved a null pointer dereference in assoc_array_apply_edit() due to incorrect node-splitting in assoc_array implementation. This affects the keyring key type and thus key addition and link creation operations may cause the kernel to panic.

Find out more about CVE-2017-12193 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7,MRG-2 and realtime kernels. Future Linux kernel updates for the respective releases may address this issue.

CVSS v3 metrics

CVSS3 Base Score 4.7
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2018:0181 2018-01-25
Red Hat Enterprise Linux 7 (kernel) RHSA-2018:0151 2018-01-25
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2018:0152 2018-01-25

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 kernel-alt Will not fix
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank Fan Wu (University of Hong Kong), Haoran Qiu (University of Hong Kong), Shixiong Zhao (University of Hong Kong), and Heming Cui (University of Hong Kong) for reporting this issue.
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