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UbuntuUSN-5489-1
HistoryJun 21, 2022 - 12:00 a.m.

QEMU vulnerabilities

2022-06-2100:00:00
ubuntu.com
63

8.2 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.002 Low

EPSS

Percentile

55.3%

Releases

  • Ubuntu 22.04 LTS
  • Ubuntu 21.10
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM

Packages

  • qemu - Machine emulator and virtualizer

Details

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)

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Ways of integration

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8.2 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.002 Low

EPSS

Percentile

55.3%

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