Qemu before 2.0 block driver for Hyper-V VHDX Images is vulnerable to infinite loops and other potential issues when calculating BAT entries, due to missing bounds checks for block_size and logical_sector_size variables. These are used to derive other fields like 'sectors_per_block' etc. A user able to alter the Qemu disk image could ise this flaw to crash the Qemu instance resulting in DoS.

Qemu before 2.0 block driver for Hyper-V VHDX Images is vulnerable to infinite loops and other potential issues when calculating BAT entries, due to missing bounds checks for block_size and logical_sector_size variables. These are used to derive other fields like 'sectors_per_block' etc. A user able to alter the Qemu disk image could ise this flaw to crash the Qemu instance resulting in DoS.

qemu: crash by possible division by zero Qemu: block: multiple integer overflow flaws Qemu: block: missing input validation Qemu: prevent possible buffer overflows Qemu: qcow2: NULL dereference in qcow2_open() error path Qemu: block: possible crash due signed types or logic error Qemu: vhdx: bounds checking for block_size and logical_sector_size qemu: virtio-net: buffer overflow in virtio_net_handle_mac() function

Withdrawn by the publisher.

Affected: Ubuntu:14.04:LTS: qemu

Qemu before 2.0 block driver for Hyper-V VHDX Images is vulnerable to infinite loops and other potential issues when calculating BAT entries, due to missing bounds checks for block_size and logical_sector_size variables. These are used to derive other fields like 'sectors_per_block' etc. A user able to alter the Qemu disk image could ise this flaw to crash the Qemu instance resulting in DoS.