CVE-2020-8428

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.

El archivo fs/namei.c en el kernel de Linux versiones anteriores a 5.5, presenta una vulnerabilidad de uso de la memoria previamente liberada en la función may_create_in_sticky, que permite a usuarios locales causar una denegación de servicio (OOPS) u obtener información confidencial de la memoria del kernel, también se conoce como CID-d0cb50185ae9. Un vector de ataque puede ser una llamada de sistema abierta para un socket del dominio UNIX, si el socket está siendo movido hacia un nuevo directorio padre y su antiguo directorio padre está siendo eliminado.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-28 CVE Reserved
2020-01-28 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (16)

URL	Tag	Source
http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html	X_refsource_misc
http://www.openwall.com/lists/oss-security/2020/01/28/4	Mailing List
http://www.openwall.com/lists/oss-security/2020/02/02/1	Mailing List
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html	Mailing List
https://security.netapp.com/advisory/ntap-20200313-0003	X_refsource_confirm
https://www.openwall.com/lists/oss-security/2020/01/28/2	Mailing List

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6	2020-06-10
https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6	2020-06-10

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html	2020-06-10
https://usn.ubuntu.com/4318-1	2020-06-10
https://usn.ubuntu.com/4319-1	2020-06-10
https://usn.ubuntu.com/4320-1	2020-06-10
https://usn.ubuntu.com/4324-1	2020-06-10
https://usn.ubuntu.com/4325-1	2020-06-10
https://www.debian.org/security/2020/dsa-4667	2020-06-10
https://www.debian.org/security/2020/dsa-4698	2020-06-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.19 < 5.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19 < 5.5"		-		Affected