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Vulnerability of OVMF: NULL pointer dereference via AuthenticodeVerify

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via AuthenticodeVerify() of OVMF, in order to trigger a denial of service.
Vulnerable products: Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 21/12/2020.
Références of this bulletin: CVE-2019-14584, DLA-2645-1, openSUSE-SU-2020:2314-1, openSUSE-SU-2020:2336-1, openSUSE-SU-2021:0598-1, SUSE-SU-2020:3883-1, SUSE-SU-2020:3884-1, SUSE-SU-2020:3885-1, USN-4684-1, VIGILANCE-VUL-34176.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via AuthenticodeVerify() of OVMF, in order to trigger a denial of service.
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This computer threat impacts software or systems such as Debian, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability alert is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this cybersecurity weakness.

Solutions for this threat 

Debian 9: new edk2 packages.
New packages are available:
  Debian 9: edk2 0~20161202.7bbe0b3e-1+deb9u2

openSUSE Leap 15.1: new ovmf packages.
New packages are available:
  openSUSE Leap 15.1: ovmf 2017+git1510945757.b2662641d5-lp151.11.12.1

openSUSE Leap 15.2: new ovmf packages.
New packages are available:
  openSUSE Leap 15.2: ovmf 201911-lp152.6.8.1

openSUSE Leap 15.2: new shim packages.
New packages are available:
  openSUSE Leap 15.2: shim 15.4-lp152.4.8.1

SUSE LE 12 SP5: new ovmf packages.
New packages are available:
  SUSE LE 12 SP5: ovmf 2017+git1510945757.b2662641d5-3.32.1

SUSE LE 15 SP1-2: new ovmf packages.
New packages are available:
  SUSE LE 15 SP1: ovmf 2017+git1510945757.b2662641d5-5.38.1
  SUSE LE 15 SP2: ovmf 201911-7.8.1

Ubuntu: new ovmf packages.
New packages are available:
  Ubuntu 20.10: ovmf 2020.05-5ubuntu0.1
  Ubuntu 20.04 LTS: ovmf 0~20191122.bd85bf54-2ubuntu3.1
  Ubuntu 18.04 LTS: ovmf 0~20180205.c0d9813c-2ubuntu0.3
  Ubuntu 16.04 LTS: ovmf 0~20160408.ffea0a2c-2ubuntu0.2
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