Packages
- qemu - Machine emulator and virtualizer
Details
Ken Johnson and Jann Horn independently discovered that microprocessors
utilizing speculative execution of a memory read may allow unauthorized
memory reads via sidechannel attacks. An attacker in the guest could use
this to expose sensitive guest information, including kernel memory. This
update allows QEMU to expose new CPU features added by AMD microcode
updates to guests on amd64 and i386.
Ken Johnson and Jann Horn independently discovered that microprocessors
utilizing speculative execution of a memory read may allow unauthorized
memory reads via sidechannel attacks. An attacker in the guest could use
this to expose sensitive guest information, including kernel memory. This
update allows QEMU to expose new CPU features added by AMD microcode
updates to guests on amd64 and i386.
Update instructions
After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 18.04 bionic | qemu – 1:2.11+dfsg-1ubuntu7.3 | ||
| qemu-system – 1:2.11+dfsg-1ubuntu7.3 | |||
| qemu-system-x86 – 1:2.11+dfsg-1ubuntu7.3 | |||
| 17.10 artful | qemu – 1:2.10+dfsg-0ubuntu3.8 | ||
| qemu-system – 1:2.10+dfsg-0ubuntu3.8 | |||
| qemu-system-x86 – 1:2.10+dfsg-0ubuntu3.8 | |||
| 16.04 xenial | qemu – 1:2.5+dfsg-5ubuntu10.30 | ||
| qemu-system – 1:2.5+dfsg-5ubuntu10.30 | |||
| qemu-system-x86 – 1:2.5+dfsg-5ubuntu10.30 | |||
| 14.04 trusty | qemu – 2.0.0+dfsg-2ubuntu1.43 | ||
| qemu-system – 2.0.0+dfsg-2ubuntu1.43 | |||
| qemu-system-x86 – 2.0.0+dfsg-2ubuntu1.43 | |||
Reduce your security exposure
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