CVE-2023-3354

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.

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

Security Fix(es):

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.(CVE-2023-3354)

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

Security Fix(es):

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.(CVE-2023-3354)

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

• QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service (CVE-2023-3354)

• NTFS-3G: buffer overflow issue in NTFS-3G can cause code execution via crafted metadata in an NTFS image (CVE-2022-40284)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• "No bootable device" with OS boot disk interface VirtIO-SCSI and with more than 9 VirtIO disks. (BZ#2228485)

A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.

Security Fix(es):

• QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service (CVE-2023-3354)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• [qemu-kvm] rhel guest failed boot with multi disks on error Failed to start udev Wait for Complete Device Initialization (BZ#2211923)
• [almalinux9.2] hotplug/hotunplug mlx vdpa device to the occupied addr port, then qemu core dump occurs after shutdown guest (BZ#2227721)

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

• QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service (CVE-2023-3354)
• NTFS-3G: buffer overflow issue in NTFS-3G can cause code execution via crafted metadata in an NTFS image (CVE-2022-40284)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• "No bootable device" with OS boot disk interface VirtIO-SCSI and with more than 9 VirtIO disks. (BZ#2228485)

These are all security issues fixed in the qemu-8.0.4-1.1 package on the GA media of openSUSE Tumbleweed.

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-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-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).
• CVE-2021-3750: Fixed DMA reentrancy issue leads to use-after-free in hcd-ehci (bsc#1190011).

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)

This update for qemu fixes the following issues:

• CVE-2021-3750: Fixed DMA reentrancy issue that could lead to use-after-free (bsc#1190011)
• CVE-2022-0216: Fixed use-after-free in lsi_do_msgout function in hw/scsi/lsi53c895a.c (bsc#1198038)
• CVE-2023-0330: Fixed DMA reentrancy issue that could lead to stack overflow (bsc#1207205)
• CVE-2023-3180: Fixed heap buffer overflow in virtio_crypto_sym_op_helper() (bsc#1213925)
• CVE-2023-3354: Fixed improper I/O watch removal in VNC TLS handshake that could lead to remote unauthenticated denial of service (bsc#1212850)

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)