CVE-2020-0543

Published: 09 June 2020

Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

From the Ubuntu security team

It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY read operations on Intel client and Xeon E3 processors may be briefly exposed to processes on the same or different processor cores. A local attacker could use this to expose sensitive information.

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
intel-microcode
Launchpad, Ubuntu, Debian 		Upstream Needed

Ubuntu 20.10 (Groovy Gorilla)
Released (3.20200609.0ubuntu0.20.04.0)
Ubuntu 20.04 LTS (Focal Fossa)
Released (3.20200609.0ubuntu0.20.04.0)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (3.20200609.0ubuntu0.18.04.0)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (3.20200609.0ubuntu0.16.04.0)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.20200609.0ubuntu0.14.04.0)

Notes

AuthorNote
tyhicks 
This issue only affects Intel client and Xeon E3 processors
sbeattie 
also known as "CrossTalk"
sbeattie 
Affected processor families:
=============  ============  ========
common name    Family_Model  Stepping
=============  ============  ========
IvyBridge      06_3AH        All
Haswell        06_3CH        All
Haswell_L      06_45H        All
Haswell_G      06_46H        All
Broadwell_G    06_47H        All
Broadwell      06_3DH        All
Skylake_L      06_4EH        All
Skylake        06_5EH        All
Kabylake_L     06_8EH        <= 0xC
Kabylake       06_9EH        <= 0xD
=============  ============  ========

References

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