CVE-2016-1887

FreeBSD Kernel (FreeBSD 10.2 x64) - 'sendmsg' Kernel Heap Overflow (PoC)

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Integer signedness error in the sockargs function in sys/kern/uipc_syscalls.c in FreeBSD 10.1 before p34, 10.2 before p17, and 10.3 before p3 allows local users to cause a denial of service (memory overwrite and kernel panic) or gain privileges via a negative buflen argument, which triggers a heap-based buffer overflow.

Error de entero sin signo en la función sockargs en sys/kern/uipc_syscalls.c en FreeBSD 10.1 en versiones anteriores a p34, 10.2 en versiones anteriores a p17 y 10.3 en versiones anteriores a p3 permite a usuarios locales provocar una denegación de servicio (sobreescritura de memoria y kernel panic) u obtener privilegios a través de un argumento buflen negativo, lo que desencadena un desbordamiento de buffer basado en memoria dinámica.

Incorrect argument handling in the socket code allows malicious local user to overwrite large portion of the kernel memory. Malicious local user may crash kernel or execute arbitrary code in the kernel, potentially gaining superuser privileges.

*Credits: N/A

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

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-13 CVE Reserved
2016-05-18 CVE Published
2016-05-29 First Exploit
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (4)

URL	Tag	Source
http://www.securitytracker.com/id/1035906	Vdb Entry

URL	Date	SRC
https://www.exploit-db.com/exploits/44212	2016-05-29
http://cturt.github.io/sendmsg.html	2024-08-05

URL	Date	SRC

URL	Date	SRC
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:19.sendmsg.asc	2016-05-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.1 Search vendor "Freebsd" for product "Freebsd" and version "10.1"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.2 Search vendor "Freebsd" for product "Freebsd" and version "10.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.3 Search vendor "Freebsd" for product "Freebsd" and version "10.3"		-		Affected