USN-4372-1: QEMU vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 19.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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 attacker in a guest could use this issue to cause QEMU to crash,
resulting in a denial of service. This issue only affected Ubuntu 20.04
LTS. (CVE-2020-11869)

Aviv Sasson discovered that QEMU incorrectly handled Slirp networking. A
remote attacker 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 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10.
(CVE-2020-1983)

Update instructions

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

Ubuntu 20.04

• 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

• 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

• 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.

References

• CVE-2019-15034
• CVE-2019-20382
• CVE-2020-10702
• CVE-2020-11869
• CVE-2020-1983

Related notices

• USN-7094-1: qemu-system-data, qemu-system-aarch64, qemu-system-arm, qemu-utils, qemu-block-extra, qemu-system-misc, qemu-system-sparc, qemu-block-supplemental, qemu-guest-agent, qemu-system-mips, qemu-user-static, qemu-system, qemu-system-modules-opengl, qemu-common, qemu-keymaps, qemu-user-binfmt, qemu-system-xen, qemu-user, qemu-system-x86, qemu-kvm, qemu-system-x86-microvm, qemu-system-ppc, qemu-system-common, qemu, qemu-system-x86-xen, qemu-system-s390x, qemu-system-modules-spice, qemu-system-gui