未評価
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 regio...
CVE-2021-3750
SecPulse初出
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2021-3750 qemu 修正版: 1:7.0+dfsg-1
原文の説明 取得元が公開している説明をそのまま載せています (多くは英語)。
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.
参照URL
- advisory gitlab.com
- advisory security.gentoo.org
- advisory security.netapp.com
- report bugzilla.redhat.com
- report gitlab.com