CVE-2018-11506

La función sr_do_ioctl en drivers/scsi/sr_ioctl.c en el kernel de Linux hasta 4.16.12 permite a los usuarios locales causar una denegación de servicio (desbordamiento de búfer basado en pila) o, posiblemente, provocar otro impacto no especificado debido a que los búferes de sentido tienen diferentes tamaños en la capa de CDROM y en la capa SCSI, tal y como queda demostrado con una llamada ioctl CDROMREADMODE2.

The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel allows local users to cause a denial of service via a stack-based buffer overflow or possibly have unspecified other impact because sense buffers have different sizes at the CDROM layer and the SCSI layer.

Piotr Gabriel Kosinski and Daniel Shapira discovered a stack-based buffer overflow in the CDROM driver implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Jann Horn discovered that the ext4 filesystem implementation in the Linux kernel did not properly keep xattr information consistent in some situations. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues have also been addressed.