CVE-2018-17158

FreeBSD Security Advisory - FreeBSD-SA-18:13.nfs

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error can occur when handling the client address length field in an NFSv4 request. Unprivileged remote users with access to the NFS server can crash the system by sending a specially crafted NFSv4 request.

En FreeBSD, en versiones anteriores a la 11.2-STABLE(r340854) y la 11.2-RELEASE-p5, puede ocurrir un error de desbordamiento de enteros al manejar el campo de longitud de dirección del cliente en una petición NFSv4. Los usuarios remotos sin privilegios con acceso al servidor NFS pueden provocar el cierre inesperado del sistema mediante el envío de una petición NFSv4 especialmente manipulada.

Insufficient and improper checking in the NFS server code could cause a denial of service or possibly remote code execution via a specially crafted network packet. A remote attacker could cause the NFS server to crash, resulting in a denial of service, or possibly execute arbitrary code on the server.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-09-18 CVE Reserved
2018-11-28 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound

CAPEC

References (4)

URL	Tag	Source
http://www.securityfocus.com/bid/106192	Third Party Advisory
http://www.securitytracker.com/id/1042164	Third Party Advisory
https://secuniaresearch.flexerasoftware.com/secunia_research/2018-24	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc	2018-12-31

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"				< 11.2 Search vendor "Freebsd" for product "Freebsd" and version " < 11.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.2 Search vendor "Freebsd" for product "Freebsd" and version "11.2"		p5		Affected