CVE-2023-6534

TCP spoofing vulnerability in pf(4)

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers. This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.

En las versiones de FreeBSD 14.0-RELEASE anteriores a 14-RELEASE-p2, FreeBSD 13.2-RELEASE anteriores a 13.2-RELEASE-p7 y FreeBSD 12.4-RELEASE anteriores a 12.4-RELEASE-p9, el filtro de paquetes pf(4) valida incorrectamente los números de secuencia TCP. Esto podría permitir que un actor malintencionado ejecute un ataque de denegación de servicio contra hosts detrás del firewall.

*Credits: Yuxiang Yang, Ao Wang, Xuewei Feng, Qi Li and Ke Xu from Tsinghua University

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

2023-12-05 CVE Reserved
2023-12-13 CVE Published
2025-02-13 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (2)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20240112-0007

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.freebsd.org/advisories/FreeBSD-SA-23:17.pf.asc	2024-01-12

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"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p4		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p5		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p6		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p7		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		p8		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		rc2-p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.4 Search vendor "Freebsd" for product "Freebsd" and version "12.4"		rc2-p2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p4		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p5		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.2 Search vendor "Freebsd" for product "Freebsd" and version "13.2"		p6		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				14.0 Search vendor "Freebsd" for product "Freebsd" and version "14.0"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				14.0 Search vendor "Freebsd" for product "Freebsd" and version "14.0"		beta5		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				14.0 Search vendor "Freebsd" for product "Freebsd" and version "14.0"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				14.0 Search vendor "Freebsd" for product "Freebsd" and version "14.0"		rc3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				14.0 Search vendor "Freebsd" for product "Freebsd" and version "14.0"		rc4-p1		Affected