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             AUSCERT External Security Bulletin Redistribution

                              ESB-2020.1704.2
                       USN-4359-1: APT vulnerability
                                29 May 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           apt
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Linux variants
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3810  

Original Bulletin: 
   https://usn.ubuntu.com/4359-1/
   https://usn.ubuntu.com/4359-2/

Comment: This bulletin contains two (2) Ubuntu security advisories.
         
         This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running apt check for an updated version of the software for their 
         operating system.

Revision History:  May 29 2020: Vendor released USN-4359-2 to fix a regression in overlayfs
                   May 14 2020: Initial Release

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USN-4359-1: APT vulnerability
14 May 2020

apt vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 20.04 LTS
  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

APT could be made to crash if it opened a specially crafted file.

Software Description

  o apt - Advanced front-end for dpkg

Details

It was discovered that APT incorrectly handled certain filenames during package
installation. If an attacker could provide a specially crafted package to be
installed by the system administrator, this could cause APT to crash.

Update instructions

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

Ubuntu 20.04 LTS
    apt - 2.0.2ubuntu0.1
Ubuntu 19.10
    apt - 1.9.4ubuntu0.1
Ubuntu 18.04 LTS
    apt - 1.6.12ubuntu0.1
Ubuntu 16.04 LTS
    apt - 1.2.32ubuntu0.1

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

In general, a standard system update will make all the necessary changes.

References

  o CVE-2020-3810

- --------------------------------------------------------------------------------

USN-4359-2: APT vulnerability
28 May 2020

apt vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 14.04 ESM
  o Ubuntu 12.04 ESM

Summary

APT could be made to crash if it opened a specially crafted file.

Software Description

  o apt - Advanced front-end for dpkg

Details

USN-4359-1 fixed a vulnerability in APT. This update provides the corresponding
update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory details:

It was discovered that APT incorrectly handled certain filenames during package
installation. If an attacker could provide a specially crafted package to be
installed by the system administrator, this could cause APT to crash.

Update instructions

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

Ubuntu 14.04 ESM
    apt - 1.0.1ubuntu2.24+esm1
Ubuntu 12.04 ESM
    apt - 0.8.16~exp12ubuntu10.29

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

In general, a standard system update will make all the necessary changes.

References

  o USN-4359-1
  o CVE-2020-3810

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