babiloo 2.0.9 before 2.0.11 creates temporary files with predictable names when downloading and unpacking dictionary files, allowing a local attacker to overwrite arbitrary files.
libpoe-component-irc-perl before v6.32 does not remove carriage returns and line feeds. This can be used to execute arbitrary IRC commands by passing an argument such as "some text\rQUIT" to the 'privmsg' handler, which would cause the client to disconnect from the server.
It is possible to cause a DoS condition by causing the server to crash in alien-arena 7.33 by supplying various invalid parameters to the download command.
If LD_LIBRARY_PATH is undefined in gargoyle-free before 2009-08-25, the variable will point to the current directory. This can allow a local user to trick another user into running gargoyle in a directory with a cracked libgarglk.so and gain access to the user's account.