CVE-2017-14340

MEDIUM

Description

The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc

http://seclists.org/oss-sec/2017/q3/436

http://www.debian.org/security/2017/dsa-3981

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2

http://www.securityfocus.com/bid/100851

https://access.redhat.com/errata/RHSA-2017:2918

https://bugzilla.redhat.com/show_bug.cgi?id=1491344

https://github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65cc

Details

Source: MITRE

Published: 2017-09-15

Updated: 2017-12-07

Type: CWE-476

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C)

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM