CVE-2017-2584

Kernel: kvm: use after free in complete_emulated_mmio

Severity Score

7.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.

arch/x86/kvm/emulate.c en el kernel de Linux hasta la versión 4.9.3 permite a usuarios locales obtener información sensible de memoria del kernel o provocar una denegación de servicio (uso después de liberación de memoria) a través de una aplicación manipulada que aprovecha la emulación de instrucciones para fxrstor, fxsave, sgdt y sidt.

USN-3358-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. Please note that this update changes the Linux HWE kernel to the 4.10 based kernel from Ubuntu 17.04, superseding the 4.8 based HWE kernel from Ubuntu 16.10. Ben Harris discovered that the Linux kernel would strip extended privilege attributes of files when performing a failed unprivileged system call. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

High

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-12-01 CVE Reserved
2017-01-15 CVE Published
2024-08-05 CVE Updated
2025-03-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-416: Use After Free

CAPEC

References (9)

URL	Tag	Source
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74d	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2017/01/13/7	Mailing List
http://www.securityfocus.com/bid/95430	Vdb Entry
http://www.securitytracker.com/id/1037603	Vdb Entry
https://github.com/torvalds/linux/commit/129a72a0d3c8e139a04512325384fe5ac119e74d	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.debian.org/security/2017/dsa-3791	2018-08-24
https://bugzilla.redhat.com/show_bug.cgi?id=1413001	2017-08-01
https://usn.ubuntu.com/3754-1	2018-08-24
https://access.redhat.com/security/cve/CVE-2017-2584	2017-08-01

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"				<= 4.9.3 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.9.3"		-		Affected