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AUSCERT External Security Bulletin Redistribution
ESB-2021.0667
USN-4467-3: QEMU regression
23 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: QEMU
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-13754
Reference: ESB-2021.0366
ESB-2020.2866
ESB-2020.2546
ESB-2020.2448
Original Bulletin:
https://ubuntu.com/security/notices/USN-4467-3
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USN-4467-3: QEMU regression
22 February 2021
USN-4467-1 introduced a regression in QEMU.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o qemu - Machine emulator and virtualizer
Details
USN-4467-1 fixed vulnerabilities in QEMU. The fix for CVE-2020-13754
introduced a regression in certain environments. This update fixes the
problem.
We apologize for the inconvenience.
Original advisory details:
Ren Ding, Hanqing Zhao, Alexander Bulekov, and Anatoly Trosinenko
discovered that the QEMU incorrectly handled certain msi-x mmio operations.
An attacker inside a guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. ( CVE-2020-13754 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o qemu - 1:5.0-5ubuntu9.6
o qemu-system - 1:5.0-5ubuntu9.6
o qemu-system-arm - 1:5.0-5ubuntu9.6
o qemu-system-mips - 1:5.0-5ubuntu9.6
o qemu-system-misc - 1:5.0-5ubuntu9.6
o qemu-system-ppc - 1:5.0-5ubuntu9.6
o qemu-system-s390x - 1:5.0-5ubuntu9.6
o qemu-system-sparc - 1:5.0-5ubuntu9.6
o qemu-system-x86 - 1:5.0-5ubuntu9.6
o qemu-system-x86-microvm - 1:5.0-5ubuntu9.6
o qemu-system-x86-xen - 1:5.0-5ubuntu9.6
Ubuntu 20.04
o qemu - 1:4.2-3ubuntu6.14
o qemu-system - 1:4.2-3ubuntu6.14
o qemu-system-arm - 1:4.2-3ubuntu6.14
o qemu-system-mips - 1:4.2-3ubuntu6.14
o qemu-system-misc - 1:4.2-3ubuntu6.14
o qemu-system-ppc - 1:4.2-3ubuntu6.14
o qemu-system-s390x - 1:4.2-3ubuntu6.14
o qemu-system-sparc - 1:4.2-3ubuntu6.14
o qemu-system-x86 - 1:4.2-3ubuntu6.14
o qemu-system-x86-microvm - 1:4.2-3ubuntu6.14
o qemu-system-x86-xen - 1:4.2-3ubuntu6.14
Ubuntu 18.04
o qemu - 1:2.11+dfsg-1ubuntu7.36
o qemu-system - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-arm - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-mips - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-misc - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-ppc - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-s390x - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-sparc - 1:2.11+dfsg-1ubuntu7.36
o qemu-system-x86 - 1:2.11+dfsg-1ubuntu7.36
Ubuntu 16.04
o qemu - 1:2.5+dfsg-5ubuntu10.51
o qemu-system - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-aarch64 - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-arm - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-mips - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-misc - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-ppc - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-s390x - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-sparc - 1:2.5+dfsg-5ubuntu10.51
o qemu-system-x86 - 1:2.5+dfsg-5ubuntu10.51
After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.
References
o https://launchpad.net/bugs/1914883
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