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             AUSCERT External Security Bulletin Redistribution

                    USN-4349-1: EDK II vulnerabilities
                                1 May 2020


        AusCERT Security Bulletin Summary

Product:           edk2
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Increased Privileges     -- Remote/Unauthenticated      
                   Denial of Service        -- Remote/Unauthenticated      
                   Access Confidential Data -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-14587 CVE-2019-14586 CVE-2019-14575
                   CVE-2019-14563 CVE-2019-14559 CVE-2019-14558
                   CVE-2018-12181 CVE-2018-12180 CVE-2018-12178

Reference:         ESB-2020.1510

Original Bulletin: 

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USN-4349-1: EDK II vulnerabilities
30 April 2020

edk2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS


Several security issues were fixed in edk2.

Software Description

  o edk2 - UEFI firmware for 64-bit x86 virtual machines


A buffer overflow was discovered in the network stack. An unprivileged user
could potentially enable escalation of privilege and/or denial of service. This
issue was already fixed in a previous release for 18.04 LTS and 19.10.

A buffer overflow was discovered in BlockIo service. An unauthenticated user
could potentially enable escalation of privilege, information disclosure and/or
denial of service. This issue was already fixed in a previous release for 18.04
LTS and 19.10. (CVE-2018-12180)

A stack overflow was discovered in bmp. An unprivileged user could potentially
enable denial of service or elevation of privilege via local access. This issue
was already fixed in a previous release for 18.04 LTS and 19.10.

It was discovered that memory was not cleared before free that could lead to
potential password leak. (CVE-2019-14558)

A memory leak was discovered in ArpOnFrameRcvdDpc. An attacker could possibly
use this issue to cause a denial of service or other unspecified impact.

An integer overflow was discovered in MdeModulePkg/PiDxeS3BootScriptLib. An
attacker could possibly use this issue to cause a denial of service or other
unspecified impact. (CVE-2019-14563)

It was discovered that the affected version doesn't properly check whether an
unsigned EFI file should be allowed or not. An attacker could possibly load
unsafe content by bypassing the verification. (CVE-2019-14575)

It was discovered that original configuration runtime memory is freed, but it
is still exposed to the OS runtime. (CVE-2019-14586)

A double-unmap was discovered in TRB creation. An attacker could use it to
cause a denial of service or other unspecified impact. (CVE-2019-14587)

Update instructions

The problem can be corrected by updating your system to the following package

Ubuntu 19.10
    ovmf - 0~20190606.20d2e5a1-2ubuntu1.1
    qemu-efi-aarch64 - 0~20190606.20d2e5a1-2ubuntu1.1
    qemu-efi-arm - 0~20190606.20d2e5a1-2ubuntu1.1
Ubuntu 18.04 LTS
    ovmf - 0~20180205.c0d9813c-2ubuntu0.2
    qemu-efi-aarch64 - 0~20180205.c0d9813c-2ubuntu0.2
    qemu-efi-arm - 0~20180205.c0d9813c-2ubuntu0.2
Ubuntu 16.04 LTS
    ovmf - 0~20160408.ffea0a2c-2ubuntu0.1
    qemu-efi - 0~20160408.ffea0a2c-2ubuntu0.1

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

After a standard system update you need to restart the virtual machines that
use the affected firmware to make all the necessary changes.


  o CVE-2018-12178
  o CVE-2018-12180
  o CVE-2018-12181
  o CVE-2019-14558
  o CVE-2019-14559
  o CVE-2019-14563
  o CVE-2019-14575
  o CVE-2019-14586
  o CVE-2019-14587

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