CVE-2019-14378

La función ip_reass en el archivo ip_input.c en libslirp versión 4.0.0, presenta un desbordamiento de búfer en la región heap de la memoria por medio de un paquete largo debido a que maneja inapropiadamente un caso que involucra el primer fragmento.

A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the ip_reass() routine while reassembling incoming packets if the first fragment is bigger than the m->m_dat[] buffer. An attacker could use this flaw to crash the QEMU process on the host, resulting in a Denial of Service or potentially executing arbitrary code with privileges of the QEMU process.

It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. Sergej Schumilo, Cornelius Aschermann and Simon Woerner discovered that the qxl paravirtual graphics driver implementation in QEMU contained a null pointer dereference. A local attacker in a guest could use this to cause a denial of service. Various other issues were also addressed.