CVE-2020-8608

En libslirp versión 4.1.0, como es usado en QEMU versión 4.2.0, el archivo tcp_subr.c utiliza inapropiadamente los valores de retorno de snprintf, lo que conlleva a un desbordamiento del búfer en el código posterior.

An out-of-bounds heap buffer access flaw was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in tcp_emu() routine while emulating IRC and other protocols due to unsafe usage of the snprintf(3) function. A user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.

It was discovered that the SLiRP networking implementation of the QEMU emulator did not properly manage memory under certain circumstances. An attacker could use this to cause a heap-based buffer overflow or other out- of-bounds access, which can lead to a denial of service or potentially execute arbitrary code. It was discovered that the SLiRP networking implementation of the QEMU emulator misuses snprintf return values. An attacker could use this to cause a denial of service or potentially execute arbitrary code. Various other issues were also addressed.