Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : qemu update (USN-3679-1) (Spectre)
Medium Nessus Plugin ID 110514
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionKen 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.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected qemu, qemu-system and / or qemu-system-x86 packages.