CVE-2017-14340

kernel: xfs: unprivileged user kernel oops

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La macro XFS_IS_REALTIME_INODE en fs/xfs/xfs_linux.h en el kernel de Linux en versiones anteriores a la 4.13.2 no verifica que un sistema de archivos tenga un dispositivo realtime, lo que permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULL y OOPS) mediante vectores relacionados con la configuración de una marca RHINHERIT en un directorio.

A flaw was found where the XFS filesystem code mishandles a user-settable inode flag in the Linux kernel prior to 4.14-rc1. This can cause a local denial of service via a kernel panic.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-09-12 CVE Reserved
2017-09-15 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-391: Unchecked Error Condition
CWE-476: NULL Pointer Dereference

CAPEC

References (9)

URL	Tag	Source
http://www.securityfocus.com/bid/100851	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc	2017-12-07
http://seclists.org/oss-sec/2017/q3/436	2017-12-07
https://bugzilla.redhat.com/show_bug.cgi?id=1491344	2017-10-19
https://github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65cc	2017-12-07

URL	Date	SRC
http://www.debian.org/security/2017/dsa-3981	2017-12-07
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2	2017-12-07
https://access.redhat.com/errata/RHSA-2017:2918	2017-12-07
https://access.redhat.com/security/cve/CVE-2017-14340	2017-10-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.13.1 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.13.1"		-		Affected