CVE-2018-6916

FreeBSD Security Advisory - FreeBSD-SA-18:01.ipsec

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28, the kernel does not properly validate IPsec packets coming from a trusted host. Additionally, a use-after-free vulnerability exists in the IPsec AH handling code. This issue could cause a system crash or other unpredictable results.

En FreeBSD, en versiones anteriores a 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7 y 10.3-RELEASE-p28, el kernel no valida correctamente los paquetes IPsec provenientes de un host de confianza. Además, existe una vulnerabilidad de uso de memoria previamente liberada en el código de manipulación de IPsec AH. Este problema podría provocar un cierre inesperado del sistema u otro tipo de resultado impredecible.

Due to a lack of strict checking, an attacker from a trusted host can send a specially constructed IP packet that may lead to a system crash. Additionally, a use-after-free vulnerability in the AH handling code could cause unpredictable results. Access to out of bounds or freed mbuf data can lead to a kernel panic or other unpredictable results.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-02-12 CVE Reserved
2018-03-07 CVE Published
2024-09-17 CVE Updated
2025-05-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (2)

URL	Tag	Source
http://www.securitytracker.com/id/1040460	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://www.freebsd.org/security/advisories/FreeBSD-SA-18:01.ipsec.asc	2018-03-29

URL	Date	SRC

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"				>= 11.0 < 11.1 Search vendor "Freebsd" for product "Freebsd" and version " >= 11.0 < 11.1"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.3 Search vendor "Freebsd" for product "Freebsd" and version "10.3"		p28		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.4 Search vendor "Freebsd" for product "Freebsd" and version "10.4"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				10.4 Search vendor "Freebsd" for product "Freebsd" and version "10.4"		p7		Affected