USN-4191-1: QEMU vulnerabilities

qemu vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 19.10
• Ubuntu 19.04
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

Several security issues were fixed in QEMU.

Software Description

• qemu - Machine emulator and virtualizer

Details

It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service. (CVE-2019-12068)

Sergej Schumilo, Cornelius Aschermann and Simon Wörner discovered that the qxl paravirtual graphics driver implementation in QEMU contained a null pointer dereference. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-12155)

Riccardo Schirone discovered that the QEMU bridge helper did not properly validate network interface names. A local attacker could possibly use this to bypass ACL restrictions. (CVE-2019-13164)

It was discovered that a heap-based buffer overflow existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. (CVE-2019-14378)

It was discovered that a use-after-free vulnerability existed in the SLiRP networking implementation of QEMU. A local attacker in a guest could use this to cause a denial of service. (CVE-2019-15890)

Update instructions

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

Ubuntu 19.10

qemu - 1:4.0+dfsg-0ubuntu9.1

qemu-kvm - 1:4.0+dfsg-0ubuntu9.1

qemu-system-common - 1:4.0+dfsg-0ubuntu9.1

qemu-system-gui - 1:4.0+dfsg-0ubuntu9.1

qemu-system-x86 - 1:4.0+dfsg-0ubuntu9.1

qemu-user-static - 1:4.0+dfsg-0ubuntu9.1

qemu-utils - 1:4.0+dfsg-0ubuntu9.1

Ubuntu 19.04

qemu - 1:3.1+dfsg-2ubuntu3.6

qemu-kvm - 1:3.1+dfsg-2ubuntu3.6

qemu-system-common - 1:3.1+dfsg-2ubuntu3.6

qemu-system-gui - 1:3.1+dfsg-2ubuntu3.6

qemu-system-x86 - 1:3.1+dfsg-2ubuntu3.6

qemu-user-static - 1:3.1+dfsg-2ubuntu3.6

qemu-utils - 1:3.1+dfsg-2ubuntu3.6

Ubuntu 18.04 LTS

qemu - 1:2.11+dfsg-1ubuntu7.20

qemu-kvm - 1:2.11+dfsg-1ubuntu7.20

qemu-system-common - 1:2.11+dfsg-1ubuntu7.20

qemu-system-x86 - 1:2.11+dfsg-1ubuntu7.20

qemu-user-static - 1:2.11+dfsg-1ubuntu7.20

qemu-utils - 1:2.11+dfsg-1ubuntu7.20

Ubuntu 16.04 LTS

qemu - 1:2.5+dfsg-5ubuntu10.42

qemu-kvm - 1:2.5+dfsg-5ubuntu10.42

qemu-system-common - 1:2.5+dfsg-5ubuntu10.42

qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.42

qemu-user-static - 1:2.5+dfsg-5ubuntu10.42

qemu-utils - 1:2.5+dfsg-5ubuntu10.42

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2019-12068
• CVE-2019-12155
• CVE-2019-13164
• CVE-2019-14378
• CVE-2019-15890

from Ubuntu Security Notices https://ift.tt/2KkYG8X