dropbear: code execution

Multiple vulnerabilities have been found in Dropbear, the worst of which allows remote attackers to execute arbitrary code.

A remote attacker could possibly execute arbitrary code with root privileges if usernames containing special characters can be created on a system. Also, a dbclient user who can control username or host arguments could potentially run arbitrary code with the privileges of the process.

In addition, a remote attacker could entice a user to process a specially crafted SSH key using dropbearconvert, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.