CVE-2021-40110

Apache James IMAP vulnerable to a ReDoS

Description

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.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 2.10% Top 20%

Third-Party Advisory openwall.com Third-Party Advisory openwall.com

Affected: Apache Software Foundation Apache James

References

Link	Tags
https://www.openwall.com/lists/oss-security/2022/01/04/2	third party advisory mailing list
http://www.openwall.com/lists/oss-security/2022/01/04/2	third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-40110?: CVE-2021-40110 has been scored as a high severity vulnerability.
How to fix CVE-2021-40110?: To fix CVE-2021-40110, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40110 being actively exploited in the wild?: It is possible that CVE-2021-40110 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40110?: CVE-2021-40110 affects Apache Software Foundation Apache James.

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