CVE-2021-3638

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash 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 out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.(CVE-2021-3638)

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 out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.(CVE-2021-3638)

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 out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.(CVE-2021-3638)

A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.(CVE-2022-2962)

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

This update for qemu fixes the following issues:

• CVE-2023-0330: Fixed a stack overflow due to a DMA reentrancy issue. (bsc#1207205)
• CVE-2023-3354: Fixed a remote unauthenticated DoS due to an improper I/O watch removal in VNC TLS handshake. (bsc#1212850)
• CVE-2023-3180: Fixed a heap buffer overflow in virtio_crypto_sym_op_helper(). (bsc#1213925)
• CVE-2021-3638: Fixed an out-of-bounds write due to an inconsistent check in ati_2d_blt(). (bsc#1188609)
• CVE-2023-3301: Fixed a DoS due to an assertion failure. (bsc#1213414)
• CVE-2021-3750: Fixed an use-after-free in DMA reentrancy issue. (bsc#1190011)

This update for qemu fixes the following issues:

• CVE-2022-26354: Fixed a memory leak due to a missing virtqueue detach on error. (bsc#1198712)
• CVE-2021-3929: Fixed an use-after-free in nvme DMA reentrancy issue. (bsc#1193880)
• CVE-2023-0330: Fixed a stack overflow due to a DMA reentrancy issue. (bsc#1207205)
• CVE-2020-13754: Fixed a DoS due to an OOB access during mmio operations. (bsc#1172382)
• CVE-2023-3354: Fixed a remote unauthenticated DoS due to an improper I/O watch removal in VNC TLS handshake. (bsc#1212850)
• CVE-2023-3180: Fixed a heap buffer overflow in virtio_crypto_sym_op_helper(). (bsc#1213925)
• CVE-2021-3638: Fixed an out-of-bounds write due to an inconsistent check in ati_2d_blt(). (bsc#1188609)
• CVE-2021-3750: Fixed an use-after-free in DMA reentrancy issue. (bsc#1190011)
• CVE-2023-2861: Fixed improper access control on special files in 9pfs (bsc#1212968).
• CVE-2022-1050: Fixed use-after-free issue in pvrdma_exec_cmd() (bsc#1197653).

The following non-security bug was fixed:

• Prepare for binutils update to 2.41 update (bsc#1215311).

This update for qemu fixes the following issues:

• CVE-2023-3180: Fixed a buffer overflow in the virtio-crypto device (bsc#1213925).
• CVE-2021-3750: Fixed a DMA reentrancy in the USB EHCI device that could lead to use-after-free (bsc#1190011).
• CVE-2021-3638: Fixed a buffer overflow in the ati-vga device (bsc#1188609).
• CVE-2023-3354: Fixed an issue when performing a TLS handshake that could lead to remote denial of service via VNC connection (bsc#1212850).
• CVE-2023-0330: Fixed a DMA reentrancy issue in the lsi53c895a device that could lead to a stack overflow (bsc#1207205).

Non-security fixes:

• Fixed a potential build issue in the librm subcomponent (bsc#1215311).
• Fixed a potential crash during VM migration (bsc#1213663).
• Fixed potential issues during installation on a Xen host (bsc#1179993, bsc#1181740).

This update for qemu fixes the following issues:

• CVE-2021-3638: hw/display/ati_2d: Fix buffer overflow in ati_2d_blt (bsc#1188609)
• CVE-2023-3180: virtio-crypto: verify src and dst buffer length for sym request (bsc#1213925)
• CVE-2023-3354: io: remove io watch if TLS channel is closed during handshake (bsc#1212850)
• [openSUSE] roms/ipxe: Backport 0aa2e4ec9635, in preparation of binutils 2.41 (bsc#1215311)
• target/s390x: Fix the 'ignored match' case in VSTRS (bsc#1213210)
• linux-user/elfload: Enable vxe2 on s390x (bsc#1213210)

This update for qemu fixes the following issues:

• CVE-2021-3638: hw/display/ati_2d: Fix buffer overflow in ati_2d_blt (bsc#1188609)
• CVE-2023-3180: virtio-crypto: verify src and dst buffer length for sym request (bsc#1213925)
• CVE-2023-3354: io: remove io watch if TLS channel is closed during handshake (bsc#1212850)
• [openSUSE] roms/ipxe: Backport 0aa2e4ec9635, in preparation of binutils 2.41 (bsc#1215311)
• target/s390x: Fix the 'ignored match' case in VSTRS (bsc#1213210)
• linux-user/elfload: Enable vxe2 on s390x (bsc#1213210)

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)