What is CVE-2021-40111?

CVE-2021-40111 is a vulnerability in Apache James that can be used for a Denial of Service attack.

How does CVE-2021-40111 affect Apache James?

CVE-2021-40111 affects Apache James versions up to and including 3.6.1.

How can I protect my Apache James server from CVE-2021-40111?

To protect your Apache James server from CVE-2021-40111, update to a version above 3.6.1.

Where can I find more information about CVE-2021-40111?

For more information about CVE-2021-40111, you can refer to the following references: [Link 1](http://www.openwall.com/lists/oss-security/2022/01/04/3), [Link 2](https://www.openwall.com/lists/oss-security/2022/01/04/3).

Vulnerability/
CVE-2021-40111

medium

6.5

CWE

835

4/1/2022

4/8/2024

CVE-2021-40111: Apache James IMAP parsing Denial Of Service

Q: What can an attacker do with CVE-2021-40111?

An attacker can use CVE-2021-40111 to trigger infinite loops, resulting in expensive CPU computations and OutOfMemory exceptions, causing a Denial of Service.

First published: Tue Jan 04 2022(Updated: )

In Apache James, while fuzzing with Jazzer the IMAP parsing stack, we discover that crafted APPEND and STATUS IMAP command could be used to trigger infinite loops resulting in expensive CPU computations and OutOfMemory exceptions. This can be used for a Denial Of Service attack. The IMAP user needs to be authenticated to exploit this vulnerability. This affected Apache James prior to version 3.6.1. This vulnerability had been patched in Apache James 3.6.1 and higher. We recommend the upgrade.

Credit: security@apache.org

Affected Software	Affected Version	How to fix
Apache James	<3.6.1

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2021-40111?
CVE-2021-40111 is a vulnerability in Apache James that can be used for a Denial of Service attack.
How does CVE-2021-40111 affect Apache James?
CVE-2021-40111 affects Apache James versions up to and including 3.6.1.
What can an attacker do with CVE-2021-40111?
An attacker can use CVE-2021-40111 to trigger infinite loops, resulting in expensive CPU computations and OutOfMemory exceptions, causing a Denial of Service.
How can I protect my Apache James server from CVE-2021-40111?
To protect your Apache James server from CVE-2021-40111, update to a version above 3.6.1.
Where can I find more information about CVE-2021-40111?
For more information about CVE-2021-40111, you can refer to the following references: [Link 1](http://www.openwall.com/lists/oss-security/2022/01/04/3), [Link 2](https://www.openwall.com/lists/oss-security/2022/01/04/3).

collector/nvd-index
agent/references
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/author
agent/weakness
agent/tags
agent/title
agent/last-modified-date
agent/first-publish-date
agent/description
agent/event
vendor/apache
canonical/apache james

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.