Elm is a terminal mode email user agent. The frm command is provided as part of the Elm packages and gives a summary list of the sender and subject of selected messages in a mailbox or folder.
A buffer overflow vulnerability was found in the frm command. An attacker could create a message with an overly long Subject line such that when the frm command is run by a victim arbitrary code is executed. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0966 to this issue.
Users of the frm command should update to these erratum packages, which contain a backported security patch that corrects this issue.
Red Hat would like to thank Paul Rubin for discovering and disclosing this issue.