CVE-2015-8660

Impact:
Moderate
Public Date:
2015-12-04
CWE:
CWE-281
Bugzilla:
1291329: CVE-2015-8660 kernel: Permission bypass on overlayfs during copy_up
The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application.

Find out more about CVE-2015-8660 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, 6 as the code with the flaw is not present in the products listed.

This issue does not affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 7 and Red Hat Enterprise MRG 2 as the due updates to fix
this issue have been shipped now.

CVSS v2 metrics

Base Score 6
Base Metrics AV:L/AC:H/Au:S/C:C/I:C/A:C
Access Vector Local
Access Complexity High
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2016:1532 2016-08-02
Red Hat Enterprise Linux 7 (kernel) RHSA-2016:1539 2016-08-02
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2016:1541 2016-08-02

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected

Acknowledgements

Red Hat would like to thank Nathan Williams for reporting this issue.
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