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AUSCERT External Security Bulletin Redistribution
ESB-2020.1832
USN-4372-1: QEMU vulnerabilities
22 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: QEMU
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-11869 CVE-2020-10702 CVE-2020-1983
CVE-2019-20382 CVE-2019-15034
Reference: ESB-2020.1635
ESB-2020.1450
ESB-2020.1166
Original Bulletin:
https://usn.ubuntu.com/4372-1/
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USN-4372-1: QEMU vulnerabilities
21 May 2020
qemu vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 20.04 LTS
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in QEMU.
Software Description
o qemu - Machine emulator and virtualizer
Details
It was discovered that QEMU incorrectly handled bochs-display devices. A local
attacker in a guest could use this to cause a denial of service or possibly
execute arbitrary code in the host. This issue only affected Ubuntu 19.10.
(CVE-2019-15034)
It was discovered that QEMU incorrectly handled memory during certain VNC
operations. A remote attacker could possibly use this issue to cause QEMU to
consume resources, resulting in a denial of service. This issue only affected
Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2019-20382)
It was discovered that QEMU incorrectly generated QEMU Pointer Authentication
signatures on ARM. A local attacker could possibly use this issue to bypass
PAuth. This issue only affected Ubuntu 19.10. (CVE-2020-10702)
Ziming Zhang discovered that QEMU incorrectly handled ATI VGA emulation. A
local attacker in a guest could use this issue to cause QEMU to crash,
resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS.
(CVE-2020-11869)
Aviv Sasson discovered that QEMU incorrectly handled Slirp networking. A remote
attacker could use this issue to cause QEMU to crash, resulting in a denial of
service, or possibly execute arbitrary code. This issue only affected Ubuntu
16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. (CVE-2020-1983)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04 LTS
qemu - 1:4.2-3ubuntu6.1
qemu-system - 1:4.2-3ubuntu6.1
qemu-system-arm - 1:4.2-3ubuntu6.1
qemu-system-mips - 1:4.2-3ubuntu6.1
qemu-system-ppc - 1:4.2-3ubuntu6.1
qemu-system-s390x - 1:4.2-3ubuntu6.1
qemu-system-sparc - 1:4.2-3ubuntu6.1
qemu-system-x86 - 1:4.2-3ubuntu6.1
Ubuntu 19.10
qemu - 1:4.0+dfsg-0ubuntu9.6
qemu-system - 1:4.0+dfsg-0ubuntu9.6
qemu-system-arm - 1:4.0+dfsg-0ubuntu9.6
qemu-system-mips - 1:4.0+dfsg-0ubuntu9.6
qemu-system-ppc - 1:4.0+dfsg-0ubuntu9.6
qemu-system-s390x - 1:4.0+dfsg-0ubuntu9.6
qemu-system-sparc - 1:4.0+dfsg-0ubuntu9.6
qemu-system-x86 - 1:4.0+dfsg-0ubuntu9.6
Ubuntu 18.04 LTS
qemu - 1:2.11+dfsg-1ubuntu7.26
qemu-system - 1:2.11+dfsg-1ubuntu7.26
qemu-system-arm - 1:2.11+dfsg-1ubuntu7.26
qemu-system-mips - 1:2.11+dfsg-1ubuntu7.26
qemu-system-ppc - 1:2.11+dfsg-1ubuntu7.26
qemu-system-s390x - 1:2.11+dfsg-1ubuntu7.26
qemu-system-sparc - 1:2.11+dfsg-1ubuntu7.26
qemu-system-x86 - 1:2.11+dfsg-1ubuntu7.26
Ubuntu 16.04 LTS
qemu - 1:2.5+dfsg-5ubuntu10.44
qemu-system - 1:2.5+dfsg-5ubuntu10.44
qemu-system-aarch64 - 1:2.5+dfsg-5ubuntu10.44
qemu-system-arm - 1:2.5+dfsg-5ubuntu10.44
qemu-system-mips - 1:2.5+dfsg-5ubuntu10.44
qemu-system-ppc - 1:2.5+dfsg-5ubuntu10.44
qemu-system-s390x - 1:2.5+dfsg-5ubuntu10.44
qemu-system-sparc - 1:2.5+dfsg-5ubuntu10.44
qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.44
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-2019-15034
o CVE-2019-20382
o CVE-2020-10702
o CVE-2020-11869
o CVE-2020-1983
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