CVE-2020-25650

Se encontró un fallo en la manera en que el demonio de spice-vdagentd manejaba las transferencias de archivos desde el sistema host hacia la máquina virtual. Cualquier usuario invitado local no privilegiado con acceso a la ruta del socket del dominio de UNIX "/ run/spice-vdagentd/spice-vdagent-sock" podría usar este fallo para llevar a cabo una denegación de servicio de la memoria para spice-vdagentd o inclusive otros procesos en el sistema de la VM. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema. Este fallo afecta a las versiones 0.20 y versiones anteriores a spice-vdagent

A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual machine. This flaw allows any unprivileged local guest user with access to the UNIX domain socket path `/run/spice-vdagentd/spice-vdagent-sock` to perform a memory denial of service for spice-vdagentd or other processes in the VM system. The highest threat from this vulnerability is to 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.