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USN-4191-2: QEMU vulnerabilities

14 November 2019

Several security issues were fixed in QEMU.

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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 W├Ârner 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 14.04

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

Related notices

  • USN-4191-1: qemu-system-common, qemu-system-s390x, qemu-user-static, qemu-system-arm, qemu-block-extra, qemu-system-misc, qemu-system-aarch64, qemu-system-x86, qemu-guest-agent, qemu-system-sparc, qemu-system-data, qemu-system-mips, qemu-kvm, qemu-user, qemu, qemu-user-binfmt, qemu-utils, qemu-system-gui, qemu-system, qemu-system-ppc