Race condition in the can_open function in Elm ME+ 2.4, when installed setgid mail and the operating system lacks POSIX saved ID support, allows local users to read and modify certain files with the privileges of the mail group.

Elm ME+ 2.4 before PL109S, when installed setgid mail and the operating system lacks POSIX saved ID support, allows local users to read and modify certain files with the privileges of the mail group via unspecified vectors.

Multiple buffer overflows in filter command in Elm 2.4 allows attackers to execute arbitrary commands via (1) long From: headers, (2) long Reply-To: headers, or (3) via a long -f (filterfile) command line argument.

Local users can execute commands as other users, and read other users' files, through the filter command in the Elm elm-2.4 mail package using a symlink attack.