Debian: DSA-4934-1: intel-microcode security update

Advisories

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Debian Security Advisory DSA-4934-1                   [email protected]
https://www.debian.org/security/                       Moritz Muehlenhoff
June 26, 2021                         https://www.debian.org/security/faq
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Package        : intel-microcode
CVE ID         : CVE-2020-24489 CVE-2020-24511 CVE-2020-24512 CVE-2020-24513

This update ships updated CPU microcode for some types of Intel CPUs and
provides mitigations for security vulnerabilities which could result in
privilege escalation in combination with VT-d and various side channel
attacks.

For the stable distribution (buster), these problems have been fixed in
version 3.20210608.2~deb10u1.

Note that there are two reported regressions; for some CoffeeLake CPUs
this update may break iwlwifi
(https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/56)
and some for Skylake R0/D0 CPUs on systems using a very outdated firmware/BIOS,
the system may hang on boot:
(https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/31)

If you are affected by those issues, you can recover by disabling microcode
loading on boot (as documented in README.Debian (also available online at
https://salsa.debian.org/hmh/intel-microcode/-/blob/master/debian/README.Debian))

We recommend that you upgrade your intel-microcode packages.

For the detailed security status of intel-microcode please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/intel-microcode

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

Mailing list: [email protected]

Debian: DSA-4934-1: intel-microcode security update

June 26, 2021
This update ships updated CPU microcode for some types of Intel CPUs and provides mitigations for security vulnerabilities which could result in privilege escalation in combination...

Summary

This update ships updated CPU microcode for some types of Intel CPUs and
provides mitigations for security vulnerabilities which could result in
privilege escalation in combination with VT-d and various side channel
attacks.

For the stable distribution (buster), these problems have been fixed in
version 3.20210608.2~deb10u1.

Note that there are two reported regressions; for some CoffeeLake CPUs
this update may break iwlwifi
(https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/56)
and some for Skylake R0/D0 CPUs on systems using a very outdated firmware/BIOS,
the system may hang on boot:
(https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/31)

If you are affected by those issues, you can recover by disabling microcode
loading on boot (as documented in README.Debian (also available online at
https://salsa.debian.org/hmh/intel-microcode/-/blob/master/debian/README.Debian))

We recommend that you upgrade your intel-microcode packages.

For the detailed security status of intel-microcode please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/intel-microcode

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

Mailing list: [email protected]

Severity
Package : intel-microcode
CVE ID : CVE-2020-24489 CVE-2020-24511 CVE-2020-24512 CVE-2020-24513

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