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AUSCERT External Security Bulletin Redistribution
ESB-2019.1709
USN-3978-1: QEMU update
15 May 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: qemu
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11091 CVE-2019-9824 CVE-2019-5008
CVE-2018-20815 CVE-2018-12130 CVE-2018-12127
CVE-2018-12126
Reference: ASB-2019.0138
ESB-2019.1705
ESB-2019.1639
ESB-2019.1244
Original Bulletin:
https://usn.ubuntu.com/3978-1/
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USN-3978-1: QEMU update
14 May 2019
qemu update
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
Summary
Several issues were addressed in QEMU.
Software Description
o qemu - Machine emulator and virtualizer
Details
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan
Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa
Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos,
Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered
that memory previously stored in microarchitectural fill buffers of an Intel
CPU core may be exposed to a malicious process that is executing on the same
CPU core. A local attacker could use this to expose sensitive information.
(CVE-2018-12130)
Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan van
Schaik, Alyssa Milburn, Sebastian A sterlund, Pietro Frigo, Kaveh Razavi,
Herbert Bos, and Cristiano Giuffrida discovered that memory previously stored
in microarchitectural load ports of an Intel CPU core may be exposed to a
malicious process that is executing on the same CPU core. A local attacker
could use this to expose sensitive information. (CVE-2018-12127)
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel
Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel
Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory
previously stored in microarchitectural store buffers of an Intel CPU core may
be exposed to a malicious process that is executing on the same CPU core. A
local attacker could use this to expose sensitive information. (CVE-2018-12126)
Kurtis Miller discovered that a buffer overflow existed in QEMU when loading a
device tree blob. A local attacker could use this to execute arbitrary code.
(CVE-2018-20815)
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur, Moritz
Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa Milburn,
Sebastian A sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano
Giuffrida discovered that uncacheable memory previously stored in
microarchitectural buffers of an Intel CPU core may be exposed to a malicious
process that is executing on the same CPU core. A local attacker could use this
to expose sensitive information. (CVE-2019-11091)
It was discovered that a NULL pointer dereference existed in the sun4u power
device implementation in QEMU. A local attacker could use this to cause a
denial of service. This issue only affected Ubuntu 18.10 and Ubuntu 19.04.
(CVE-2019-5008)
William Bowling discovered that an information leak existed in the SLiRP
networking implementation of QEMU. An attacker could use this to expose
sensitive information. (CVE-2019-9824)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
qemu - 1:3.1+dfsg-2ubuntu3.1
qemu-system-x86 - 1:3.1+dfsg-2ubuntu3.1
Ubuntu 18.10
qemu - 1:2.12+dfsg-3ubuntu8.7
qemu-system-x86 - 1:2.12+dfsg-3ubuntu8.7
Ubuntu 18.04 LTS
qemu - 1:2.11+dfsg-1ubuntu7.13
qemu-system-x86 - 1:2.11+dfsg-1ubuntu7.13
Ubuntu 16.04 LTS
qemu - 1:2.5+dfsg-5ubuntu10.38
qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.38
Ubuntu 14.04 ESM
qemu - 2.0.0+dfsg-2ubuntu1.46
qemu-system-x86 - 2.0.0+dfsg-2ubuntu1.46
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
o CVE-2018-12126
o CVE-2018-12127
o CVE-2018-12130
o CVE-2018-20815
o CVE-2019-11091
o CVE-2019-5008
o CVE-2019-9824
o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS
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