CVE-2017-7533

Linux Kernel < 3.16.39 (Debian 8 x64) - 'inotfiy' Local Privilege Escalation

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Race condition in the fsnotify implementation in the Linux kernel through 4.12.4 allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that leverages simultaneous execution of the inotify_handle_event and vfs_rename functions.

Una condición de carrera en la implementación de fsnotify en el kernel de Linux hasta la versión 4.12.4, permite a los usuarios locales alcanzar privilegios o causar una denegación de servicio (corrupción de memoria) por medio de una aplicación creada que aprovecha la ejecución simultánea de las funciones inotify_handle_event y vfs_rename.

A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-04-05 CVE Reserved
2017-08-04 CVE Published
2017-10-16 First Exploit
2024-08-05 CVE Updated
2024-08-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-642: External Control of Critical State Data

CAPEC

References (22)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2019/06/27/7	Mailing List
http://www.openwall.com/lists/oss-security/2019/06/28/1	Mailing List
http://www.openwall.com/lists/oss-security/2019/06/28/2	Mailing List
http://www.securityfocus.com/bid/100123	Third Party Advisory
http://www.securitytracker.com/id/1039075	Third Party Advisory
https://source.android.com/security/bulletin/2017-12-01	Third Party Advisory
https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg1408967.html	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/44302	2017-10-16

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=49d31c2f389acfe83417083e1208422b4091cd9e	2023-06-21
http://openwall.com/lists/oss-security/2017/08/03/2	2023-06-21
https://bugzilla.redhat.com/show_bug.cgi?id=1468283	2017-10-10
https://github.com/torvalds/linux/commit/49d31c2f389acfe83417083e1208422b4091cd9e	2023-06-21
https://patchwork.kernel.org/patch/9755753	2023-06-21
https://patchwork.kernel.org/patch/9755757	2023-06-21

URL	Date	SRC
http://www.debian.org/security/2017/dsa-3927	2023-06-21
http://www.debian.org/security/2017/dsa-3945	2023-06-21
https://access.redhat.com/errata/RHSA-2017:2473	2023-06-21
https://access.redhat.com/errata/RHSA-2017:2585	2023-06-21
https://access.redhat.com/errata/RHSA-2017:2669	2023-06-21
https://access.redhat.com/errata/RHSA-2017:2770	2023-06-21
https://access.redhat.com/errata/RHSA-2017:2869	2023-06-21
https://access.redhat.com/security/cve/CVE-2017-7533	2017-10-10

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"				>= 3.14 < 3.16.47 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.14 < 3.16.47"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.17 < 3.18.64 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 3.18.64"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.19 < 4.4.80 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.19 < 4.4.80"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.9.41 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.41"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.10 < 4.12.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.12.5"		-		Affected