In Apache HTTP Server 2.4.0 to 2.4.41, mod_proxy_ftp may use uninitialized memory when proxying to a malicious FTP server.
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.debian.org/security/2020/dsa-4757
https://usn.ubuntu.com/4458-1/
https://security.netapp.com/advisory/ntap-20200413-0002/
https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html
https://httpd.apache.org/security/vulnerabilities_24.html
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00002.html