Movemail
Encyclopedia
Movemail is a computer program
by the GNU Project
that moves mail
from a user's Unix
mailspool
to another file. It is part of GNU Mailutils.
A compromising of Movemail was the backbone of the hack
described in The Cuckoo's Egg
by which Markus Hess
broke into the Lawrence Berkeley National Laboratory
computer system in 1986. The flaw in Movemail, which has long since been repaired, is that the program was revised in 1986 to allow superuser
access into the host computer in order to move POP
email
. The Movemail bug has been highlighted as one of the Unix
operating system
family's most egregious failures of security.
Computer program
A computer program is a sequence of instructions written to perform a specified task with a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute...
by the GNU Project
GNU Project
The GNU Project is a free software, mass collaboration project, announced on September 27, 1983, by Richard Stallman at MIT. It initiated GNU operating system development in January, 1984...
that moves mail
Email
Electronic mail, commonly known as email or e-mail, is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks. Some early email systems required that the author and the recipient both be online at the...
from a user's Unix
Unix
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...
mailspool
Spooling
In computer science, spool refers to the process of placing data in a temporary working area for another program to process. The most common use is in writing files on a magnetic tape or disk and entering them in the work queue for another process. Spooling is useful because devices access data at...
to another file. It is part of GNU Mailutils.
A compromising of Movemail was the backbone of the hack
Hacker (computer security)
In computer security and everyday language, a hacker is someone who breaks into computers and computer networks. Hackers may be motivated by a multitude of reasons, including profit, protest, or because of the challenge...
described in The Cuckoo's Egg
The Cuckoo's Egg (book)
The Cuckoo's Egg: Tracking a Spy Through the Maze of Computer Espionage is a 1989 book written by Clifford Stoll. It is his first-person account of the hunt for a computer cracker who broke into a computer at the Lawrence Berkeley National Laboratory .-Summary:Clifford Stoll managed some...
by which Markus Hess
Markus Hess
Markus Hess, a German citizen, is best known for his endeavours as a hacker in the late 1980s. Hess was recruited by the KGB to be an international spy with the objective of securing U.S...
broke into the Lawrence Berkeley National Laboratory
Lawrence Berkeley National Laboratory
The Lawrence Berkeley National Laboratory , is a U.S. Department of Energy national laboratory conducting unclassified scientific research. It is located on the grounds of the University of California, Berkeley, in the Berkeley Hills above the central campus...
computer system in 1986. The flaw in Movemail, which has long since been repaired, is that the program was revised in 1986 to allow superuser
Superuser
On many computer operating systems, the superuser is a special user account used for system administration. Depending on the operating system, the actual name of this account might be: root, administrator or supervisor....
access into the host computer in order to move POP
Post Office Protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP and IMAP are the two most prevalent Internet standard protocols for e-mail retrieval. Virtually all modern...
Email
Electronic mail, commonly known as email or e-mail, is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks. Some early email systems required that the author and the recipient both be online at the...
. The Movemail bug has been highlighted as one of the Unix
Unix
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...
operating system
Operating system
An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...
family's most egregious failures of security.