Astra Linux - уязвимость в qemu

A reentrancy issue related to DMA was discovered in the USB EHCI controller emulation of QEMU. EHCI does not verify whether the Buffer Pointer overlaps with its MMIO region when transferring USB packets. Crafted content may be written to the controller’s registers, potentially triggering...

The vulnerability of the qemu-kvm hardware emulation package from QEMU allows a attacker to trigger a service failure.

The vulnerability of the qemu-kvm hardware emulation package from QEMU is related to the lack of checks to ensure that the buffer pointer does not overlap with the MMIO region during USB packet transmission. Exploiting this vulnerability can allow an attacker to cause a service failure...

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host resulting in a denial of service condition or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.

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