CVE-2020-25578

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular, tmpfs(5), smbfs(5), autofs(5) and mqueuefs(5) were failing to do so. As a result, eight uninitialized kernel stack bytes may be leaked to userspace by these file systems.

En FreeBSD versiones 12.2-STABLE anteriores a r368969, 11.4-STABLE anteriores a r369047, 12.2-RELEASE anteriores a p3, 12.1-RELEASE anteriores a p13 y 11.4-RELEASE anteriores a p7, varios sistemas de archivos no estaban inicializando apropiadamente el campo d_off de las estructuras dirent devueltas por VOP_READDIR. En particular, tmpfs(5), smbfs(5), autofs(5) y mqueuefs(5) no lo hicieron. Como resultado, estos sistemas de archivos pueden filtrar ocho bytes de la pila del kernel no inicializados al espacio de usuario.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-14 CVE Reserved
2021-03-26 CVE Published
2023-12-10 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-665: Improper Initialization

CAPEC

References (2)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210423-0002	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:01.fsdisclosure.asc	2022-06-28

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"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p4		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p5		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				11.4 Search vendor "Freebsd" for product "Freebsd" and version "11.4"		p6		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p10		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p11		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p12		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p4		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p5		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p6		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p7		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p8		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.1 Search vendor "Freebsd" for product "Freebsd" and version "12.1"		p9		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.2 Search vendor "Freebsd" for product "Freebsd" and version "12.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.2 Search vendor "Freebsd" for product "Freebsd" and version "12.2"		p1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				12.2 Search vendor "Freebsd" for product "Freebsd" and version "12.2"		p2		Affected