CVE-2019-10207

Se encontró un fallo en la implementación Bluetooth del kernel de Linux de UART, todas las versiones del kernel 3.x.x anteriores a 4.18.0 y kernel 5.x.x. Un atacante con acceso local y permisos de escritura en el hardware de Bluetooth podría usar este fallo para emitir una llamada de función ioctl especialmente diseñada y causar que el sistema se bloquee.

A flaw was found in the Linux kernel’s Bluetooth implementation of UART. An attacker with local access and write permissions to the Bluetooth hardware could use this flaw to issue a specially crafted ioctl function call and cause the system to crash.

It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Bluetooth UART implementation in the Linux kernel did not properly check for missing tty operations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.