CVE-2020-27121

A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.

A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.

Una vulnerabilidad en Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software podría permitir a un atacante remoto autenticado causar que Cisco XCP Authentication Service en un dispositivo afectado se reinicie, resultando en una condición de denegación de servicio (DoS). La vulnerabilidad es debido al manejo inapropiado de las peticiones de inicio de sesión. Un atacante podría explotar esta vulnerabilidad mediante el envío de una petición de inicio de sesión de cliente diseñada hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar que un proceso se bloquee, resultando en una condición de DoS para nuevos intentos de inicio de sesión. Los usuarios que estén autenticados en el momento del ataque no serían afectados. Existen soluciones que abordan esta vulnerabilidad