CVE-2016-4558

Linux Kernel (Ubuntu 16.04) - Reference Count Overflow Using BPF Maps

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted application on (1) a system with more than 32 Gb of memory, related to the program reference count or (2) a 1 Tb system, related to the map reference count.

El subsistema BPF en el kernel de Linux en versiones anteriores a 4.5.5 no maneja correctamente las cuentas de referencia, lo que permite a usuarios locales provocar una denegación de servicio (uso después de liberación de memoria) o posiblemente tener otro impacto no especificado a través de una aplicación manipulada en (1) un sistema con más de 32 GB de memoria, relacionado con el programa de cuentas de referencia o (2) un sistema de 1 Tb, relacionado con el mapa de cuentas de referencia.

*Credits: N/A

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

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

2016-05-04 First Exploit
2016-05-06 CVE Reserved
2016-05-23 CVE Published
2023-07-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (9)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/05/06/4	Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1334303	Issue Tracking

URL	Date	SRC
https://www.exploit-db.com/exploits/39773	2016-05-04

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117d8443bc5afacc8d5ba82e541946310f106e	2023-06-07
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5	2023-06-07
http://www.ubuntu.com/usn/USN-3005-1	2023-06-07
http://www.ubuntu.com/usn/USN-3006-1	2023-06-07
http://www.ubuntu.com/usn/USN-3007-1	2023-06-07
https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e	2023-06-07

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"				>= 4.4 < 4.4.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 4.4.11"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.5.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.5.5"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected