An issue was discovered on Mitel 6869i through 4.5.0.41 and 5.x through 5.0.0.1018 devices. A command injection vulnerability exists in the hostname parameter taken in by the provis.html endpoint. The provis.html endpoint performs no sanitization on the hostname parameter (sent by an authenticated user), which is subsequently written to disk. During boot, the hostname parameter is executed as part of a series of shell commands. Attackers can achieve remote code execution in the root context by placing shell metacharacters in the hostname parameter.

A key length vulnerability in the implementation of the SRTP 128-bit key on Mitel 6800 and 6900 SIP series phones, versions 5.1.0.2051 SP2 and earlier, could allow an attacker to launch a man-in-the-middle attack when SRTP is used in a call. A successful exploit may allow the attacker to intercept sensitive information.