21 nails in Exim mail server: Vulnerabilities enable 'full remote unauthenticated code execution', millions of boxes at risk

Nearly 4 million to be exact, say researchers

Researchers at security biz Qualys discovered 21 vulnerabilities in Exim, a popular mail server, which can be chained to obtain "a full remote unauthenticated code execution and gain root privileges on the Exim Server."...