USN-4191-2: QEMU vulnerabilities

Releases

• Ubuntu 14.04 ESM

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.

References

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

Related notices

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