Debian Long Term Support / LTS Security Information / 2018 / Security Information -- DLA-1446-1 intel-microcode

Debian Security Advisory

DLA-1446-1 intel-microcode -- LTS security update

Date Reported:

27 Jul 2018

Affected Packages:

intel-microcode

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2018-3639, CVE-2018-3640.

More information:

Security researchers identified two software analysis methods that, if used for malicious purposes, have the potential to improperly gather sensitive data from multiple types of computing devices with different vendors’ processors and operating systems.

This update requires an update to the intel-microcode package, which is non-free. Users who have already installed the version from jessie-backports-sloppy do not need to upgrade.

• CVE-2018-3639

  Speculative Store Bypass (SSB) – also known as Variant 4

  Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.

• CVE-2018-3640

  Rogue System Register Read (RSRE) – also known as Variant 3a

  Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of system parameters to an attacker with local user access via a side-channel analysis.

For Debian 8 Jessie, these problems have been fixed in version 3.20180703.2~deb8u1.

We recommend that you upgrade your intel-microcode packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS