C-Kermit (aka ckermit) through 10.0 Beta.12 (aka 416-beta12) before 244644d allows a remote Kermit system to overwrite files on the local system, or retrieve arbitrary files from the local system.

References

• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1123025
• https://github.com/KermitProject/ckermit/pull/20
• https://www.complete.org/kermit/
• https://www.kermitproject.org/ftp/kermit/test/tar/