In NetKit through 0.17, rcp.c in the rcp client allows remote rsh servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. This is similar to CVE-2018-20685.
bugs.debian.org/920486
lists.debian.org/debian-lts-announce/2021/11/msg00016.html
lists.fedoraproject.org/archives/list/[email protected]/message/DU33YVEDGFDMAZPSRQTRVKSKG4FAX7QB/
lists.fedoraproject.org/archives/list/[email protected]/message/FSEX3TKX2DBUKG4A7VJFDLSMZIBJQZ3G/
lists.fedoraproject.org/archives/list/[email protected]/message/NA24VQJATZWYV42JG2PQUW7IHIZS7UKP/
sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt