// For flags

CVE-2021-40110

Apache James IMAP vulnerable to a ReDoS

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.

En Apache James, usando Jazzer fuzzer, identificamos que un usuario de IMAP puede diseñar comandos IMAP LIST para orquestar una denegación de servicio usando una expresión regular vulnerable. Esto afectaba a Apache James versiones anteriores a 3.6.1. Recomendamos actualizar a Apache James versión 3.6.1 o superior, que refuerza el uso del motor de expresiones regulares RE2J para ejecutar regex en tiempo lineal sin retroceso

*Credits: Apache James PMC would like to thanks Benoit TELLIER for this report.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-25 CVE Reserved
  • 2022-01-04 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-09-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
James
Search vendor "Apache" for product "James"
< 3.6.1
Search vendor "Apache" for product "James" and version " < 3.6.1"
-
Affected