Summary
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.
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 14.04 LTS 14.04:LTS | qemu | 2.0.0+dfsg-2ubuntu1.43 |
| Ubuntu · 16.04 LTS 16.04:LTS | qemu | 1:2.5+dfsg-5ubuntu10.30 |
| Ubuntu · 18.04 LTS 18.04:LTS | qemu | 1:2.11+dfsg-1ubuntu7.3 |
Vulnerabilities 1
-
Medium 5.5
Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addre…
References
-
report
https://ubuntu.com/security/CVE-2018-3639