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Ubuntu 21.04, 20.10, 20.04 LTS Security Advisory: QEMU DoS Threats

ubuntu
Calendar Grey July 15, 2021
Dist Ubuntu Esm H88
Various vulnerabilities discovered in QEMU impacting Ubuntu systems necessitate prompt patches for protection.
Several security issues were fixed in QEMU.

Summary

Several security issues were fixed in QEMU.

Software Description:

- qemu: Machine emulator and virtualizer

Details:

Lei Sun discovered that QEMU incorrectly handled certain MMIO operations.

An attacker inside the guest could possibly use this issue to cause QEMU to

crash, resulting in a denial of service. (CVE-2020-15469)

Wenxiang Qian discovered that QEMU incorrectly handled certain ATAPI

commands. An attacker inside the guest could possibly use this issue to

cause QEMU to crash, resulting in a denial of service. This issue only

affected Ubuntu 21.04. (CVE-2020-29443)

Cheolwoo Myung discovered that QEMU incorrectly handled SCSI device

emulation. An attacker inside the guest could possibly use this issue to

cause QEMU to crash, resulting in a denial of service. (CVE-2020-35504,

CVE-2020-35505, CVE-2021-3392)

Alex Xu discovered that QEMU incorrectly handled the virtio-fs shared file

system daemon. An attacker inside the guest could possibly use this issue

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service DoS Ubuntu QEMU

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.04:
  qemu-system                     1:5.2+dfsg-9ubuntu3.1
  qemu-system-arm                 1:5.2+dfsg-9ubuntu3.1
  qemu-system-mips                1:5.2+dfsg-9ubuntu3.1
  qemu-system-misc                1:5.2+dfsg-9ubuntu3.1
  qemu-system-ppc                 1:5.2+dfsg-9ubuntu3.1
  qemu-system-s390x               1:5.2+dfsg-9ubuntu3.1
  qemu-system-sparc               1:5.2+dfsg-9ubuntu3.1
  qemu-system-x86                 1:5.2+dfsg-9ubuntu3.1
  qemu-system-x86-microvm         1:5.2+dfsg-9ubuntu3.1
  qemu-system-x86-xen             1:5.2+dfsg-9ubuntu3.1

Ubuntu 20.10:
  qemu-system                     1:5.0-5ubuntu9.9
  qemu-system-arm                 1:5.0-5ubuntu9.9
  qemu-system-mips                1:5.0-5ubuntu9.9
  qemu-system-misc                1:5.0-5ubuntu9.9
  qemu-system-ppc                 1:5.0-5ubuntu9.9
  qemu-system-s390x               1:5.0-5ubuntu9.9
  qemu-system-sparc               1:5.0-5ubuntu9.9
  qemu-system-x86                 1:5.0-5ubuntu9.9
  qemu-system-x86-microvm         1:5.0-5ubuntu9.9
  qemu-system-x86-xen             1:5.0-5ubuntu9.9

Ubuntu 20.04 LTS:
  qemu-system                     1:4.2-3ubuntu6.17
  qemu-system-arm                 1:4.2-3ubuntu6.17
  qemu-system-mips                1:4.2-3ubuntu6.17
  qemu-system-misc                1:4.2-3ubuntu6.17
  qemu-system-ppc                 1:4.2-3ubuntu6.17
  qemu-system-s390x               1:4.2-3ubuntu6.17
  qemu-system-sparc               1:4.2-3ubuntu6.17
  qemu-system-x86                 1:4.2-3ubuntu6.17
  qemu-system-x86-microvm         1:4.2-3ubuntu6.17
  qemu-system-x86-xen             1:4.2-3ubuntu6.17

Ubuntu 18.04 LTS:
  qemu-system                     1:2.11+dfsg-1ubuntu7.37
  qemu-system-arm                 1:2.11+dfsg-1ubuntu7.37
  qemu-system-mips                1:2.11+dfsg-1ubuntu7.37
  qemu-system-misc                1:2.11+dfsg-1ubuntu7.37
  qemu-system-ppc                 1:2.11+dfsg-1ubuntu7.37
  qemu-system-s390x               1:2.11+dfsg-1ubuntu7.37
  qemu-system-sparc               1:2.11+dfsg-1ubuntu7.37
  qemu-system-x86                 1:2.11+dfsg-1ubuntu7.37

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5010-1

CVE-2020-15469, CVE-2020-29443, CVE-2020-35504, CVE-2020-35505,

CVE-2020-35517, CVE-2021-20221, CVE-2021-20257, CVE-2021-3392,

CVE-2021-3409, CVE-2021-3416, CVE-2021-3527, CVE-2021-3544,

CVE-2021-3545, CVE-2021-3546, CVE-2021-3582, CVE-2021-3592,

CVE-2021-3593, CVE-2021-3594, CVE-2021-3595, CVE-2021-3607,

CVE-2021-3608

Severity
critical
Lowest
Low
Medium
High
Critical

July 15, 2021

Topics%20covered

Topics Covered

security advisory denial of service DoS Ubuntu QEMU

Package Information

https://launchpad.net/ubuntu/+source/qemu/1:5.2+dfsg-9ubuntu3.1
https://launchpad.net/ubuntu/+source/qemu/1:5.0-5ubuntu9.9
https://launchpad.net/ubuntu/+source/qemu/1:4.2-3ubuntu6.17
https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.37

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