Provide references for CVE-2021-43999.
Where can I find more information about CVE-2021-43999?
References are available at: https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9, http://www.openwall.com/lists/oss-security/2022/01/11/7.