system
Provide references for <CVE-2020-28247>.
user
Where can I find more information about <CVE-2020-28247>?
assistant
References are available at: https://github.com/lettre/lettre, https://github.com/RustSec/advisory-db/pull/478/files, https://rustsec.org/advisories/RUSTSEC-2020-0069.html.