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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.1188
                    USN-4315-1: Apport vulnerabilities
                               2 April 2020

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

Product:           Apport
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise       -- Existing Account
                   Read-only Data Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-8833 CVE-2020-8831 

Original Bulletin: 
   https://usn.ubuntu.com/4315-1/

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USN-4315-1: Apport vulnerabilities
2 April 2020

apport 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

Summary

Several security issues were fixed in Apport.

Software Description

  o apport - automatically generate crash reports for debugging

Details

Maximilien Bourgeteau discovered that the Apport lock file was created with
insecure permissions. This could allow a local attacker to escalate their
privileges via a symlink attack. (CVE-2020-8831)

Maximilien Bourgeteau discovered a race condition in Apport when setting crash
report permissions. This could allow a local attacker to read arbitrary files
via a symlink attack. (CVE-2020-8833)

Update instructions

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

Ubuntu 19.10
    apport - 2.20.11-0ubuntu8.8
    python-apport - 2.20.11-0ubuntu8.8
    python3-apport - 2.20.11-0ubuntu8.8
Ubuntu 18.04 LTS
    apport - 2.20.9-0ubuntu7.14
    python-apport - 2.20.9-0ubuntu7.14
    python3-apport - 2.20.9-0ubuntu7.14
Ubuntu 16.04 LTS
    apport - 2.20.1-0ubuntu2.23
    python-apport - 2.20.1-0ubuntu2.23
    python3-apport - 2.20.1-0ubuntu2.23

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-2020-8831
  o CVE-2020-8833

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