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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-40110
• https://www.openwall.com/lists/oss-security/2022/01/04/2
• http://www.openwall.com/lists/oss-security/2022/01/04/2