CVE-2021-40111: Apache James IMAP parsing Denial Of Service
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.
Affected Software
Event History
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).