ESB-2017.2322 - [Ubuntu] qemu-system: Multiple vulnerabilities 2017-09-14

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2322
                           QEMU vulnerabilities
                             14 September 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           qemu-system
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Increased Privileges     -- Existing Account      
                   Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12809 CVE-2017-11434 CVE-2017-10911
                   CVE-2017-10806 CVE-2017-10664 CVE-2017-9524
                   CVE-2017-9503 CVE-2017-9375 CVE-2017-9374
                   CVE-2017-9373 CVE-2017-9330 CVE-2017-9310
                   CVE-2017-9060 CVE-2017-8380 CVE-2017-8112
                   CVE-2017-7493  

Reference:         ESB-2017.1941
                   ESB-2017.1882
                   ESB-2017.1827
                   ESB-2017.1706

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3414-1

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USN-3414-1: QEMU vulnerabilities

Ubuntu Security Notice USN-3414-1

13th September, 2017

qemu vulnerabilities

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

Ubuntu 17.04
Ubuntu 16.04 LTS
Ubuntu 14.04 LTS

Summary

Several security issues were fixed in QEMU.

Software description

qemu - Machine emulator and virtualizer

Details

Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control.
A guest attacker could use this issue to elevate privileges inside the
guest. (CVE-2017-7493)

Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation.
A privileged attacker inside the guest could use this issue to cause QEMU
to consume resources or crash, resulting in a denial of service.
(CVE-2017-8112)

It was discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host
Bus Adapter emulation support. A privileged attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly to obtain sensitive host memory. This issue only affected Ubuntu
16.04 LTS and Ubuntu 17.04. (CVE-2017-8380)

Li Qiang discovered that QEMU incorrectly handled the Virtio GPU device. An
attacker inside the guest could use this issue to cause QEMU to consume
resources and crash, resulting in a denial of service. This issue only
affected Ubuntu 17.04. (CVE-2017-9060)

Li Qiang discovered that QEMU incorrectly handled the e1000e device. A
privileged attacker inside the guest could use this issue to cause QEMU to
hang, resulting in a denial of service. This issue only affected Ubuntu
17.04. (CVE-2017-9310)

Li Qiang discovered that QEMU incorrectly handled USB OHCI emulation
support. An attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2017-9330)

Li Qiang discovered that QEMU incorrectly handled IDE AHCI emulation
support. A privileged attacker inside the guest could use this issue to
cause QEMU to consume resources and crash, resulting in a denial of
service. (CVE-2017-9373)

Li Qiang discovered that QEMU incorrectly handled USB EHCI emulation
support. A privileged attacker inside the guest could use this issue to
cause QEMU to consume resources and crash, resulting in a denial of
service. (CVE-2017-9374)

Li Qiang discovered that QEMU incorrectly handled USB xHCI emulation
support. A privileged attacker inside the guest could use this issue to
cause QEMU to hang, resulting in a denial of service. (CVE-2017-9375)

Zhangyanyu discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2
Host Bus Adapter emulation support. A privileged attacker inside the guest
could use this issue to cause QEMU to crash, resulting in a denial of
service. (CVE-2017-9503)

It was discovered that the QEMU qemu-nbd server incorrectly handled
initialization. A remote attacker could use this issue to cause the server
to crash, resulting in a denial of service. (CVE-2017-9524)

It was discovered that the QEMU qemu-nbd server incorrectly handled
signals. A remote attacker could use this issue to cause the server to
crash, resulting in a denial of service. (CVE-2017-10664)

Li Qiang discovered that the QEMU USB redirector incorrectly handled
logging debug messages. An attacker inside the guest could use this issue
to cause QEMU to crash, resulting in a denial of service. (CVE-2017-10806)

Anthony Perard discovered that QEMU incorrectly handled Xen block-interface
responses. An attacker inside the guest could use this issue to cause QEMU
to leak contents of host memory. (CVE-2017-10911)

Reno Robert discovered that QEMU incorrectly handled certain DHCP options
strings. An attacker inside the guest could use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2017-11434)

Ryan Salsamendi discovered that QEMU incorrectly handled empty CDROM device
drives. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 16.04 LTS and Ubuntu 17.04. (CVE-2017-12809)

Update instructions

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

Ubuntu 17.04:

qemu-system-misc 1:2.8+dfsg-3ubuntu2.4
qemu-system-s390x 1:2.8+dfsg-3ubuntu2.4
qemu-system 1:2.8+dfsg-3ubuntu2.4
qemu-system-aarch64 1:2.8+dfsg-3ubuntu2.4
qemu-system-x86 1:2.8+dfsg-3ubuntu2.4
qemu-system-sparc 1:2.8+dfsg-3ubuntu2.4
qemu-system-arm 1:2.8+dfsg-3ubuntu2.4
qemu-system-ppc 1:2.8+dfsg-3ubuntu2.4
qemu-system-mips 1:2.8+dfsg-3ubuntu2.4

Ubuntu 16.04 LTS:

qemu-system-misc 1:2.5+dfsg-5ubuntu10.15
qemu-system-s390x 1:2.5+dfsg-5ubuntu10.15
qemu-system 1:2.5+dfsg-5ubuntu10.15
qemu-system-aarch64 1:2.5+dfsg-5ubuntu10.15
qemu-system-x86 1:2.5+dfsg-5ubuntu10.15
qemu-system-sparc 1:2.5+dfsg-5ubuntu10.15
qemu-system-arm 1:2.5+dfsg-5ubuntu10.15
qemu-system-ppc 1:2.5+dfsg-5ubuntu10.15
qemu-system-mips 1:2.5+dfsg-5ubuntu10.15

Ubuntu 14.04 LTS:

qemu-system-misc 2.0.0+dfsg-2ubuntu1.35
qemu-system 2.0.0+dfsg-2ubuntu1.35
qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.35
qemu-system-x86 2.0.0+dfsg-2ubuntu1.35
qemu-system-sparc 2.0.0+dfsg-2ubuntu1.35
qemu-system-arm 2.0.0+dfsg-2ubuntu1.35
qemu-system-ppc 2.0.0+dfsg-2ubuntu1.35
qemu-system-mips 2.0.0+dfsg-2ubuntu1.35

To update your system, please follow these instructions: 
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart all QEMU virtual

machines to make all the necessary changes.

References

CVE-2017-10664, CVE-2017-10806, CVE-2017-10911, CVE-2017-11434, 
CVE-2017-12809, CVE-2017-7493, CVE-2017-8112, CVE-2017-8380, CVE-2017-9060, 
CVE-2017-9310, CVE-2017-9330, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375, 
CVE-2017-9503, CVE-2017-9524

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