fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel...
Vulnerability Description
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.ubuntu.com/usn/USN-3070-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1355650
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://rhn.redhat.com/errata/RHSA-2016-1847.html
- http://www.securityfocus.com/bid/91709
- http://rhn.redhat.com/errata/RHSA-2016-1875.html
- http://www.ubuntu.com/usn/USN-3070-3
- http://www.securitytracker.com/id/1036273
- http://www.ubuntu.com/usn/USN-3070-2
- https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185
- http://www.openwall.com/lists/oss-security/2016/07/11/8
- http://www.ubuntu.com/usn/USN-3070-4
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CVSS Vectors
Weaknesses (CWE)
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MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.