CVE-2020-14394

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

	QEMU has two operating modes:

	Full system emulation. In this mode, QEMU emulates a full system (for example a PC),
	including one or several processors and various peripherals. It can be used to launch
	different Operating Systems without rebooting the PC or to debug system code.

	User mode emulation. In this mode, QEMU can launch processes compiled for one CPU on another CPU.
	It can be used to launch the Wine Windows API emulator (https://www.winehq.org) or to ease
	cross-compilation and cross-debugging.
	You can refer to https://www.qemu.org for more infortmation.

Security Fix(es):

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.(CVE-2020-14394)

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

This update for qemu fixes the following issues:

• bsc#1172033 (CVE-2020-13253)

• bsc#1180207 (CVE-2020-14394)

• bsc#1172382 (CVE-2020-13754)

• bsc#1198038 (CVE-2022-0216)

• bsc#1193880 (CVE-2021-3929)

• bsc#1197653 (CVE-2022-1050)

• bsc#1205808 (CVE-2022-4144), bsc#1198712 (CVE-2022-26354)

• bsc#1175144 (CVE-2020-17380, CVE-2020-25085, CVE-2021-3409), bsc#1185000 (CVE-2021-3507), bsc#1201367, CVE-2022-35414

• About bsc#1175144, see also bsc#1182282 (CVE-2021-3409)

• bsc#1198035, CVE-2021-4206

This update for qemu fixes the following issues:

• CVE-2022-4144: Fixed unsafe address translation can lead to out-of-bounds read in qxl_phys2virt (bsc#1205808).
• CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).
• CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).
• CVE-2022-0216: Fixed a use-after-free in lsi_do_msgout function in hw/scsi/lsi53c895a.c (bsc#1198038).
• CVE-2022-1050: Fixed a use-after-free issue in pvrdma_exec_cmd() in pvrdma (bsc#1197653).
• CVE-2021-3929: Fixed a DMA reentrancy issue leads to use-after-free in nvme (bsc#1193880).

The following non-security bugs were fixed:

• Fix bsc#1202364.

This update for qemu fixes the following issues:

• CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).
• CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).

This update for qemu fixes the following issues:

• CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).
• CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).

Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the USB xHCI controller device. A privileged guest attacker could possibly use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)

It was discovered that QEMU incorrectly handled the TCG Accelerator. A local attacker could use this issue to cause QEMU to crash, leading to a denial of service, or possibly execute arbitrary code and esclate privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)

It was discovered that QEMU incorrectly handled the Intel HD audio device. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2021-3611)

It was discovered that QEMU incorrectly handled the ATI VGA device. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-3638)

It was discovered that QEMU incorrectly handled the VMWare paravirtual RDMA device. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. (CVE-2023-1544)

It was discovered that QEMU incorrectly handled the 9p passthrough filesystem. A malicious guest attacker could possibly use this issue to open special files and escape the exported 9p tree. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-2861)

It was discovered that QEMU incorrectly handled the virtual crypto device. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-3180)

It was discovered that QEMU incorrectly handled the built-in VNC server. A remote authenticated attacker could possibly use this issue to cause QEMU to stop responding, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3255)

It was discovered that QEMU incorrectly handled net device hot-unplugging. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3301)

It was discovered that QEMU incorrectly handled the built-in VNC server. A remote attacker could possibly use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-3354)

It was discovered that QEMU incorrectly handled NVME devices. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 23.10. (CVE-2023-40360)

It was discovered that QEMU incorrectly handled NVME devices. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 23.10. (CVE-2023-4135)

It was discovered that QEMU incorrectly handled SCSI devices. A malicious guest attacker could use this issue to cause QEMU to crash, leading to a denial of service. This issue only affected Ubuntu 23.04 and Ubuntu 23.10. (CVE-2023-42467)

It was discovered that QEMU incorrectly handled certain disk offsets. A malicious guest attacker could possibly use this issue to gain control of the host in certain nested virtualization scenarios. (CVE-2023-5088)