// For flags

CVE-2021-0342

kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required. User interaction is not required for exploitation. Product: Android; Versions: Android kernel; Android ID: A-146554327.

En la función tun_get_user del archivo tun.c, se presenta una posible corrupción de la memoria debido a un uso de la memoria previamente liberada. Esto podría conllevar a una escalada de privilegios local con privilegios de ejecución System requeridos. No es requerida una interacción del usuario para su explotación. Producto: Android; Versiones: kernel de Android; ID de Android: A-146554327

A flaw use after free in the Linux kernel TUN/TAP device driver functionality was found in the way user create and use tun/tap device. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include denial of service, integer overflow, null pointer, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-11-06 CVE Reserved
  • 2021-01-11 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Google
Search vendor "Google"
 Android
Search vendor "Google" for product "Android"
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Affected