Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title QEMU vulnerabilities
Name USN-4191-2 First vendor Publication 2019-11-14
Vendor Ubuntu Last vendor Modification 2019-11-14
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:P/I:P/A:P)
Cvss Base Score 6.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores


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

- Ubuntu 14.04 ESM


Several security issues were fixed in QEMU.

Software Description: - qemu: Machine emulator and virtualizer


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)

Update instructions:

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

Ubuntu 14.04 ESM:
qemu 2.0.0+dfsg-2ubuntu1.47
qemu-common 2.0.0+dfsg-2ubuntu1.47
qemu-kvm 2.0.0+dfsg-2ubuntu1.47
qemu-system-common 2.0.0+dfsg-2ubuntu1.47
qemu-system-x86 2.0.0+dfsg-2ubuntu1.47
qemu-user-static 2.0.0+dfsg-2ubuntu1.47
qemu-utils 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.

CVE-2019-12068, CVE-2019-12155, CVE-2019-13164, CVE-2019-14378,

Original Source

Url : http://www.ubuntu.com/usn/USN-4191-2

CWE : Common Weakness Enumeration

% Id Name
25 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
25 % CWE-755 Improper Handling of Exceptional Conditions
25 % CWE-476 NULL Pointer Dereference
25 % CWE-416 Use After Free

CPE : Common Platform Enumeration

Application 2
Application 3
Os 5
Os 2

Alert History

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Date Informations
2019-11-14 05:19:07
  • First insertion