CVE-2016-2143

kernel: Fork of large process causes memory corruption

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The fork implementation in the Linux kernel before 4.5 on s390 platforms mishandles the case of four page-table levels, which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted application, related to arch/s390/include/asm/mmu_context.h and arch/s390/include/asm/pgalloc.h.

La implementación fork en el kernel de Linux en versiones anteriores a 4.5 en la plataforma s390 no maneja correctamente el caso de los cuatro niveles de la tabla de página, lo que permite a usuarios locales causar una denegación de servicio (caída de sistema) o posiblemente tener otro impacto no especificado a través de una aplicación manipulada, relacionado con arch/s390/include/asm/mmu_context.h y arch/s390/include/asm/pgalloc.h.

It was reported that on s390x, the fork of a process with four page table levels will cause memory corruption with a variety of symptoms. All processes are created with three level page table and a limit of 4TB for the address space. If the parent process has four page table levels with a limit of 8PB, the function that duplicates the address space will try to copy memory areas outside of the address space limit for the child process.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Local

Attack Complexity

High

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-29 CVE Reserved
2016-04-27 CVE Published
2024-03-15 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (15)

URL	Tag	Source
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html	Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2016-2143	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3446c13b268af86391d06611327006b059b8bab1	2024-03-14
https://github.com/torvalds/linux/commit/3446c13b268af86391d06611327006b059b8bab1	2024-03-14

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html	2024-03-14
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html	2024-03-14
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html	2024-03-14
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00059.html	2024-03-14
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html	2024-03-14
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html	2024-03-14
http://rhn.redhat.com/errata/RHSA-2016-1539.html	2024-03-14
http://rhn.redhat.com/errata/RHSA-2016-2766.html	2024-03-14
http://www.debian.org/security/2016/dsa-3607	2024-03-14
https://access.redhat.com/security/cve/CVE-2016-2143	2016-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=1308908	2016-11-15

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"				>= 2.6.25 < 3.2.79 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.25 < 3.2.79"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.3 < 3.12.58 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.3 < 3.12.58"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.13 < 3.16.35 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 3.16.35"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.17 < 4.1.21 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 4.1.21"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.2 < 4.4.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.4.6"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				6.0 Search vendor "Debian" for product "Debian Linux" and version "6.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				7 Search vendor "Oracle" for product "Linux" and version "7"		0		Affected