What is the severity of ZDI-21-880?

ZDI-21-880 is considered a critical vulnerability due to its ability to allow remote code execution without authentication.

How do I fix ZDI-21-880?

To mitigate ZDI-21-880, update MySQL to the latest version available from Oracle to patch the vulnerability.

Which versions of MySQL are affected by ZDI-21-880?

ZDI-21-880 affects certain versions of MySQL that contain the vulnerable memcached plugin.

Can ZDI-21-880 be exploited without authentication?

Yes, ZDI-21-880 can be exploited by remote attackers without requiring authentication.

What is the potential impact of ZDI-21-880?

The impact of ZDI-21-880 includes the potential for remote code execution, which could compromise the integrity and confidentiality of the affected system.

Vulnerability/
ZDI-21-880

critical

9.8

2/2/2025

ZDI-21-880: MySQL memcached Plugin Integer Underflow Remote Code Execution Vulnerability

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 Append and Prepend 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.

Affected Software	Affected Version	How to fix
MySQL

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of ZDI-21-880?
ZDI-21-880 is considered a critical vulnerability due to its ability to allow remote code execution without authentication.
How do I fix ZDI-21-880?
To mitigate ZDI-21-880, update MySQL to the latest version available from Oracle to patch the vulnerability.
Which versions of MySQL are affected by ZDI-21-880?
ZDI-21-880 affects certain versions of MySQL that contain the vulnerable memcached plugin.
Can ZDI-21-880 be exploited without authentication?
Yes, ZDI-21-880 can be exploited by remote attackers without requiring authentication.
What is the potential impact of ZDI-21-880?
The impact of ZDI-21-880 includes the potential for remote code execution, which could compromise the integrity and confidentiality of the affected system.

agent/type
agent/references
agent/softwarecombine
agent/severity
agent/title
agent/description
agent/event
agent/source
agent/tags
collector/zdi-advisory
source/ZDI
alias/ZDI-21-880
alias/ZDI-CAN-13265
alias/CVE-2021-2389
agent/software-canonical-lookup
agent/software-canonical-lookup-request
vendor/oracle
canonical/mysql

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.

Frequently Asked Questions

What is the severity of ZDI-21-880?
ZDI-21-880 is considered a critical vulnerability due to its ability to allow remote code execution without authentication.
How do I fix ZDI-21-880?
To mitigate ZDI-21-880, update MySQL to the latest version available from Oracle to patch the vulnerability.
Which versions of MySQL are affected by ZDI-21-880?
ZDI-21-880 affects certain versions of MySQL that contain the vulnerable memcached plugin.
Can ZDI-21-880 be exploited without authentication?
Yes, ZDI-21-880 can be exploited by remote attackers without requiring authentication.
What is the potential impact of ZDI-21-880?
The impact of ZDI-21-880 includes the potential for remote code execution, which could compromise the integrity and confidentiality of the affected system.