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CVE-2021-40111

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Date: January 4, 2022

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.

Language: Java

Severity Score

Related Resources (4)

http://www.openwall.com/lists/oss-security/2022/01/04/3
https://nvd.nist.gov/vuln/detail/CVE-2021-40111
https://www.openwall.com/lists/oss-security/2022/01/04/3
https://www.mend.io/vulnerability-database/CVE-2021-40111

Severity Score

Weakness Type (CWE)

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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