CVE-2021-29627

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r369525, 13.0-RC4 before p0, and 12.2-RELEASE before p6, listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free.

En FreeBSD versiones 13.0-STABLE anteriores a n245050, versiones 12.2-STABLE anteriores a r369525, versiones 13.0-RC4 anteriores a p0 y versiones 12.2-RELEASE anteriores a p6, los filtros de aceptación de socket de escucha que implementan la devolución de llamada accf_create liberaron incorrectamente una cadena de argumentos proporcionada por el proceso. Las operaciones adicionales en el socket pueden conllevar a una doble liberación o un uso de la memoria previamente liberada

*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

2021-03-30 CVE Reserved
2021-04-07 CVE Published
2023-03-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-415: Double Free
CWE-416: Use After Free

CAPEC

References (2)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210423-0007	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc	2022-05-27

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"				>= 12.0 < 12.2 Search vendor "Freebsd" for product "Freebsd" and version " >= 12.0 < 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"		-		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
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		beta1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		beta2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		beta3		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		beta4		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		rc1		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		rc2		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				13.0 Search vendor "Freebsd" for product "Freebsd" and version "13.0"		rc3		Affected