CVE-2020-25653

Se encontró una vulnerabilidad de condición de carrera en la forma en que el demonio de spice-vdagentd manejaba nuevas conexiones de clientes. Este fallo puede permitir a un usuario invitado local no privilegiado convertirse en el agente activo de spice-vdagentd, resultando posiblemente en una denegación de servicio o un filtrado de información del host. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos y la disponibilidad del sistema. Este fallo afecta a spice-vdagent versiones 0.20 y anteriores

A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw allows an unprivileged local guest user to become the active agent for spice-vdagentd, possibly resulting in a denial of service or information leakage from the host. The highest threat from this vulnerability is to confidentiality as well as system availability.

Matthias Gerstner discovered that SPICE vdagent incorrectly handled the active_xfers hash table. A local attacker could possibly use this issue to cause SPICE vdagent to consume memory, resulting in a denial of service. Matthias Gerstner discovered that SPICE vdagent incorrectly handled the active_xfers hash table. A local attacker could possibly use this issue to cause SPICE vdagent to consume memory, resulting in a denial of service, or obtain sensitive file contents. Various other issues were also addressed.