USN-4191-2: QEMU vulnerabilities
14 November 2019
Several security issues were fixed in QEMU.
Releases
Packages
- qemu - Machine emulator and virtualizer
Details
USN-4191-2 fixed a vulnerability in QEMU. This update provides the
corresponding update for Ubuntu 14.04 ESM.
Original advisory 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 14.04
-
qemu-system-common
-
2.0.0+dfsg-2ubuntu1.47
-
qemu-kvm
-
2.0.0+dfsg-2ubuntu1.47
-
qemu-utils
-
2.0.0+dfsg-2ubuntu1.47
-
qemu-user-static
-
2.0.0+dfsg-2ubuntu1.47
-
qemu-system-x86
-
2.0.0+dfsg-2ubuntu1.47
-
qemu-common
-
2.0.0+dfsg-2ubuntu1.47
-
qemu
-
2.0.0+dfsg-2ubuntu1.47
After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.