CVE-2021-3507

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

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

Security Fix(es):

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.(CVE-2021-3507)

A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability. This flaw affects QEMU versions prior to 7.0.0.(CVE-2021-3611)

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:Rocky Linux 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.

The following packages have been upgraded to a later upstream version: qemu-kvm (6.2.0). (BZ#2066828)

Security Fix(es):

• QEMU: fdc: heap buffer overflow in DMA read data transfers (CVE-2021-3507)

• libvirt: missing locking in nwfilterConnectNumOfNWFilters can lead to denial of service (CVE-2022-0897)

• libguestfs: Buffer overflow in get_keys leads to DoS (CVE-2022-2211)

• swtpm: Unchecked header size indicator against expected size (CVE-2022-23645)

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.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.7 Release Notes linked from the References section.

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.

The following packages have been upgraded to a later upstream version: qemu-kvm (7.0.0). (BZ#2064757)

Security Fix(es):

• QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free (CVE-2021-3750)

• QEMU: fdc: heap buffer overflow in DMA read data transfers (CVE-2021-3507)

• QEMU: intel-hda: segmentation fault due to stack overflow (CVE-2021-3611)

• QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c (CVE-2021-4158)

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.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9.1 Release Notes linked from the References section.

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

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.

The following packages have been upgraded to a later upstream version: qemu-kvm (7.0.0). (BZ#2064757)

Security Fix(es):

• QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free (CVE-2021-3750)
• QEMU: fdc: heap buffer overflow in DMA read data transfers (CVE-2021-3507)
• QEMU: intel-hda: segmentation fault due to stack overflow (CVE-2021-3611)
• QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c (CVE-2021-4158)

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.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

This update for qemu fixes the following issues:

• CVE-2021-3409: Fixed an incomplete fix for CVE-2020-17380 and CVE-2020-25085 in sdhi controller. (bsc#1182282)
• CVE-2021-4206: Fixed an integer overflow in cursor_alloc which can lead to heap buffer overflow. (bsc#1198035)
• CVE-2021-4207: Fixed a double fetch in qxl_cursor ehich can lead to heap buffer overflow. (bsc#1198037)
• CVE-2022-0216: Fixed a use after free issue found in hw/scsi/lsi53c895a.c. (bsc#1198038)
• CVE-2022-35414: Fixed an uninitialized read during address translation that leads to a crash. (bsc#1201367)
• CVE-2021-3507: Fixed a heap buffer overflow in DMA read data transfers. (bsc#1185000)
• CVE-2020-17380: Fixed a heap buffer overflow in sdhci_sdma_transfer_multi_blocks. (bsc#1175144)

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-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).

The following non-security bugs were fixed:

• Fix bsc#1202364.
• Introduce max_hw_iov for use in scsi-generic (bsc#1190425)

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).

Alexander Bulekov discovered that QEMU incorrectly handled floppy disk emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly leak sensitive information. (CVE-2021-3507)

It was discovered that QEMU incorrectly handled NVME controller emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS. (CVE-2021-3929)

It was discovered that QEMU incorrectly handled QXL display device emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-4206, CVE-2021-4207)

Jietao Xiao, Jinku Li, Wenbo Shen, and Nanzi Yang discovered that QEMU incorrectly handled the virtiofsd shared file system daemon. An attacker inside the guest could use this issue to create files with incorrect ownership, possibly leading to privilege escalation. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-0358)

It was discovered that QEMU incorrectly handled virtio-net devices. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-26353)

It was discovered that QEMU incorrectly handled vhost-vsock devices. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-26354)