CVE-2021-2390

MySQL memcached Plugin Integer Underflow Remote Code Execution Vulnerability

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.34 and prior and 8.0.25 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Una vulnerabilidad en el producto MySQL Server de Oracle MySQL (componente: InnoDB). Las versiones compatibles que están afectadas son 5.7.34 y anteriores y 8.0.25 y anteriores. Una vulnerabilidad difícil de explotar permite a un atacante no autenticado con acceso a la red por medio de múltiples protocolos comprometer a MySQL Server. Los ataques con éxito de esta vulnerabilidad pueden resultar en una capacidad no autorizada para causar una suspensión o bloqueo repetible frecuentemente (DOS completa) de MySQL Server. CVSS 3.1 Puntuación Base 5.9 (Impactos en la Disponibilidad). Vector CVSS: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

This vulnerability allows remote attackers to execute arbitrary code on affected installations of MySQL. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of Authentication commands in the memcached plugin. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.

*Credits: Anonymous

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-12-09 CVE Reserved
2021-07-20 CVE Published
2024-07-08 EPSS Updated
2024-09-26 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-191: Integer Underflow (Wrap or Wraparound)

CAPEC

References (5)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210723-0001	Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-881	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.oracle.com/security-alerts/cpujul2021.html	2022-06-28
https://access.redhat.com/security/cve/CVE-2021-2390	2021-10-12
https://bugzilla.redhat.com/show_bug.cgi?id=1992310	2021-10-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Oracle Search vendor "Oracle"		Mysql Server Search vendor "Oracle" for product "Mysql Server"				>= 5.7.0 <= 5.7.34 Search vendor "Oracle" for product "Mysql Server" and version " >= 5.7.0 <= 5.7.34"		-		Affected
Oracle Search vendor "Oracle"		Mysql Server Search vendor "Oracle" for product "Mysql Server"				>= 8.0.0 <= 8.0.25 Search vendor "Oracle" for product "Mysql Server" and version " >= 8.0.0 <= 8.0.25"		-		Affected
Netapp Search vendor "Netapp"		Oncommand Insight Search vendor "Netapp" for product "Oncommand Insight"				-		-		Affected