Ubuntu 20.04 LTS: USN-4372-1 Critical: QEMU Denial Of Service

ubuntu

May 21, 2020

Several security issues were fixed in QEMU.

Summary

Several security issues were fixed in QEMU.

Software Description:

- qemu: Machine emulator and virtualizer

Details:

It was discovered that QEMU incorrectly handled bochs-display devices. A

local attacker in a guest could use this to cause a denial of service or

possibly execute arbitrary code in the host. This issue only affected

Ubuntu 19.10. (CVE-2019-15034)

It was discovered that QEMU incorrectly handled memory during certain VNC

operations. A remote attacker could possibly use this issue to cause QEMU

to consume resources, resulting in a denial of service. This issue only

affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10.

(CVE-2019-20382)

It was discovered that QEMU incorrectly generated QEMU Pointer

Authentication signatures on ARM. A local attacker could possibly use this

issue to bypass PAuth. This issue only affected Ubuntu 19.10.

(CVE-2020-10702)

Ziming Zhang discovered that QEMU incorrectly handled ATI VGA emulation. A

local atta...

Read the Full Advisory

Topics Covered

security advisory denial of service code execution Ubuntu vulnerability system update qemu

Update Instructions

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

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

Ubuntu 19.10:
  qemu                            1:4.0+dfsg-0ubuntu9.6
  qemu-system                     1:4.0+dfsg-0ubuntu9.6
  qemu-system-arm                 1:4.0+dfsg-0ubuntu9.6
  qemu-system-mips                1:4.0+dfsg-0ubuntu9.6
  qemu-system-ppc                 1:4.0+dfsg-0ubuntu9.6
  qemu-system-s390x               1:4.0+dfsg-0ubuntu9.6
  qemu-system-sparc               1:4.0+dfsg-0ubuntu9.6
  qemu-system-x86                 1:4.0+dfsg-0ubuntu9.6

Ubuntu 18.04 LTS:
  qemu                            1:2.11+dfsg-1ubuntu7.26
  qemu-system                     1:2.11+dfsg-1ubuntu7.26
  qemu-system-arm                 1:2.11+dfsg-1ubuntu7.26
  qemu-system-mips                1:2.11+dfsg-1ubuntu7.26
  qemu-system-ppc                 1:2.11+dfsg-1ubuntu7.26
  qemu-system-s390x               1:2.11+dfsg-1ubuntu7.26
  qemu-system-sparc               1:2.11+dfsg-1ubuntu7.26
  qemu-system-x86                 1:2.11+dfsg-1ubuntu7.26

Ubuntu 16.04 LTS:
  qemu                            1:2.5+dfsg-5ubuntu10.44
  qemu-system                     1:2.5+dfsg-5ubuntu10.44
  qemu-system-aarch64             1:2.5+dfsg-5ubuntu10.44
  qemu-system-arm                 1:2.5+dfsg-5ubuntu10.44
  qemu-system-mips                1:2.5+dfsg-5ubuntu10.44
  qemu-system-ppc                 1:2.5+dfsg-5ubuntu10.44
  qemu-system-s390x               1:2.5+dfsg-5ubuntu10.44
  qemu-system-sparc               1:2.5+dfsg-5ubuntu10.44
  qemu-system-x86                 1:2.5+dfsg-5ubuntu10.44

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