CVE-2020-7451
https://notcve.org/view.php?id=CVE-2020-7451
In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network. En FreeBSD versiones 12.1-2.1-STABLE anteriores a r358739, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p3, versiones 11.3-STABLE anteriores a r358740, y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p7, un segmento de TCP SYN-ACK o de desafío TCP-ACK sobre IPv6 que es transmitido o retransmitido no inicializa apropiadamente el campo Traffic Class que revela un byte de memoria del kernel por medio de la red. • https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc • CWE-908: Use of Uninitialized Resource •
CVE-2019-15876
https://notcve.org/view.php?id=CVE-2019-15876
In FreeBSD 12.1-STABLE before r356089, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r356090, and 11.3-RELEASE before 11.3-RELEASE-p7, driver specific ioctl command handlers in the oce network driver failed to check whether the caller has sufficient privileges allowing unprivileged users to send passthrough commands to the device firmware. En FreeBSD versiones 12.1-STABLE anteriores a r356089, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p3, versiones 11.3-STABLE anteriores a r356090 y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p7, los manejadores del comando ioctl específico del controlador en el controlador de red oce presentaron un fallo al comprobar si él que llama tiene suficientes privilegios que permite a los usuarios no privilegiados enviar comandos passthrough al firmware del dispositivo. • https://security.FreeBSD.org/advisories/FreeBSD-SA-20:05.if_oce_ioctl.asc • CWE-862: Missing Authorization •
CVE-2020-10565
https://notcve.org/view.php?id=CVE-2020-10565
grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, does not validate the address provided as part of a memrw command (read_* or write_*) by a guest through a grub2.cfg file. This allows an untrusted guest to perform arbitrary read or write operations in the context of the grub-bhyve process, resulting in code execution as root on the host OS. grub2-bhyve, como es usado en FreeBSD bhyve anterior a revisión 525916 12-02-2020, no comprueba la dirección proporcionada como parte de un comando memrw (read_* o write_*) por parte de un invitado mediante un archivo grub2.cfg. Esto permite a un invitado no confiable llevar a cabo operaciones de lectura o escritura arbitrarias en el contexto del proceso de grub-bhyve, resultando en una ejecución de código de tipo root en el Sistema Operativo host. • https://svnweb.freebsd.org/ports?view=revision&revision=525916 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVE-2020-10566
https://notcve.org/view.php?id=CVE-2020-10566
grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, mishandles font loading by a guest through a grub2.cfg file, leading to a buffer overflow. grub2-bhyve, como es usado en FreeBSD bhyve anterior a revisión 525916 12-02-2020, maneja inapropiadamente una carga de fuentes por parte de un invitado mediante un archivo grub2.cfg, conllevando a un desbordamiento de búfer. • https://svnweb.freebsd.org/ports?view=revision&revision=525916 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVE-2019-15875
https://notcve.org/view.php?id=CVE-2019-15875
In FreeBSD 12.1-STABLE before r354734, 12.1-RELEASE before 12.1-RELEASE-p2, 12.0-RELEASE before 12.0-RELEASE-p13, 11.3-STABLE before r354735, and 11.3-RELEASE before 11.3-RELEASE-p6, due to incorrect initialization of a stack data structure, core dump files may contain up to 20 bytes of kernel data previously stored on the stack. En FreeBSD versiones 12.1-STABLE anteriores a r354734, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p2, versiones 12.0-RELEASE anteriores a 12.0-RELEASE-p13, versiones 11.3-STABLE anteriores a r354735 y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p6, debido a una inicialización incorrecta de una estructura de datos de la pila, los archivos de volcado de memoria pueden contener hasta 20 bytes de datos del kernel previamente almacenados en la pila. • https://security.FreeBSD.org/advisories/FreeBSD-SA-20:03.thrmisc.asc • CWE-665: Improper Initialization •