ESB-2020.2671 – [Ubuntu] Apport: Multiple vulnerabilities

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.2671
                    USN-4449-1: Apport vulnerabilities
                               5 August 2020

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

Product:           Apport
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
                   Read-only Data Access           -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-15702 CVE-2020-15701 CVE-2020-11936

Original Bulletin: 
   https://usn.ubuntu.com/4449-1/

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USN-4449-1: Apport vulnerabilities
04 August 2020

Several security issues were fixed in Apport.
Releases

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

Packages

  o apport - automatically generate crash reports for debugging

Details

Ryota Shiga discovered that Apport incorrectly dropped privileges when
making certain D-Bus calls. A local attacker could use this issue to read
arbitrary files. (CVE-2020-11936)

Seong-Joong Kim discovered that Apport incorrectly parsed configuration
files. A local attacker could use this issue to cause Apport to crash,
resulting in a denial of service. (CVE-2020-15701)

Ryota Shiga discovered that Apport incorrectly implemented certain checks.
A local attacker could use this issue to escalate privileges and run
arbitrary code. (CVE-2020-15702)

Update instructions

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

Ubuntu 20.04

  o apport - 2.20.11-0ubuntu27.6
  o python3-apport - 2.20.11-0ubuntu27.6

Ubuntu 18.04

  o apport - 2.20.9-0ubuntu7.16
  o python-apport - 2.20.9-0ubuntu7.16
  o python3-apport - 2.20.9-0ubuntu7.16

Ubuntu 16.04

  o apport - 2.20.1-0ubuntu2.24
  o python-apport - 2.20.1-0ubuntu2.24
  o python3-apport - 2.20.1-0ubuntu2.24

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

References

  o CVE-2020-11936
  o CVE-2020-15701
  o CVE-2020-15702

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