// For flags

CVE-2020-24385

 

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().

En MidnightBSD versiones anteriores a 1.2.6 y versiones 1.3 anteriores a Agosto de 2020, y FreeBSD versiones anteriores a 7, se encontró una desreferencia del puntero NULL en la capa de emulación de Linux que permite a atacantes bloquear el kernel en ejecución. Durante la interacción binaria, td-)td_emuldata en el archivo sys/compat/linux/linux_emul.h no se inicializa y devuelve NULL desde la función em_find()

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
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
  • 2020-08-19 CVE Reserved
  • 2020-09-03 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Midnightbsd
Search vendor "Midnightbsd"
 Midnightbsd
Search vendor "Midnightbsd" for product "Midnightbsd"
 < 1.2.6
Search vendor "Midnightbsd" for product "Midnightbsd" and version " < 1.2.6"
-
Affected
Midnightbsd
Search vendor "Midnightbsd"
 Midnightbsd
Search vendor "Midnightbsd" for product "Midnightbsd"
 >= 1.3 <= 2020-08-19
Search vendor "Midnightbsd" for product "Midnightbsd" and version " >= 1.3 <= 2020-08-19"
-
Affected
Freebsd
Search vendor "Freebsd"
 Freebsd
Search vendor "Freebsd" for product "Freebsd"
 <= 7.0
Search vendor "Freebsd" for product "Freebsd" and version " <= 7.0"
-
Affected