USN-4191-1: QEMU vulnerabilities

Releases

• Ubuntu 19.10
• Ubuntu 19.04
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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

• 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

• 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

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

Related notices

• USN-4191-2: qemu-guest-agent, qemu-common, qemu-keymaps, qemu-system-misc, qemu-system-arm, qemu-system-ppc, qemu-system-common, qemu-kvm, qemu-system, qemu-system-sparc, qemu-utils, qemu-system-mips, qemu-system-aarch64, qemu-system-x86, qemu, qemu-user, qemu-user-static