CVE-2023-45233

EDK2's Network Package es susceptible a una vulnerabilidad de bucle infinito al analizar una opción PadN en el encabezado Destination Options de IPv6. Un atacante puede aprovechar esta vulnerabilidad para obtener acceso no autorizado y potencialmente provocar una pérdida de disponibilidad.

The Network Package in EDK2 is vulnerable to an infinite loop exploit when parsing a PadN option within the Destination Options header of IPv6. This flaw allows an unauthorized attacker to gain access and potentially result in a loss of system availability.

This update for ovmf fixes the following issues. Potential division-by-zero crash in edk2 due to UINT32 overflow in S3 ResumeCount. Out-of-bounds read in edk2 when processing IA_NA/IA_TA options in DHCPv6 Advertise messages. Buffer overflow in the DHCPv6 client in edk2 via a long Server ID option. Out-of-bounds read in edk2 when handling a ND Redirect message with truncated options. Infinite loop in edk2 when parsing unknown options in the Destination Options header. Infinite loop in edk2 when parsing PadN options in the Destination Options header. Buffer overflow in edk2 when processing DNS Servers options in a DHCPv6 Advertise message. Buffer overflow in edk2 when handling the Server ID option in a DHCPv6 proxy Advertise message. Predictable TCP Initial Sequence Numbers in edk2 network packages. Use of a weak pseudorandom number generator in edk2.