USN-3690-2

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Source
https://ubuntu.com/security/notices/USN-3690-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3690-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-3690-2
Published
2018-07-05T22:13:21.298622Z
Modified
2018-07-05T22:13:21.298622Z
Summary
amd64-microcode regression
Details

USN-3690-1 provided updated microcode for AMD processors to address CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some systems to fail to boot. This update reverts the update for Ubuntu 14.04 LTS.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could use this to expose sensitive information, including kernel memory.

This update provides the microcode updates for AMD 17H family processors required for the corresponding Linux kernel updates.

References

Affected packages

Ubuntu:14.04:LTS / amd64-microcode

Package

Name
amd64-microcode
Purl
pkg:deb/ubuntu/amd64-microcode@3.20180524.1~ubuntu0.14.04.2+really20130710.1?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.20180524.1~ubuntu0.14.04.2+really20130710.1

Affected versions

1.*

1.20120910-3

2.*

2.20131007.1+really20130710.1

3.*

3.20180524.1~ubuntu0.14.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "3.20180524.1~ubuntu0.14.04.2+really20130710.1",
            "binary_name": "amd64-microcode"
        }
    ]
}