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             AUSCERT External Security Bulletin Redistribution

                 USN-3964-1: python-gnupg vulnerabilities
                                3 May 2019


        AusCERT Security Bulletin Summary

Product:           python-gnupg
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Confidential Data       -- Existing Account      
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6690 CVE-2018-12020 

Reference:         ESB-2019.0477

Original Bulletin: 

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USN-3964-1: python-gnupg vulnerabilities
2 May 2019

python-gnupg vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.04
  o Ubuntu 18.10
  o Ubuntu 18.04 LTS


Several security issues were fixed in python-gnupg

Software Description

  o python-gnupg - Python wrapper for the GNU Privacy Guard


Marcus Brinkmann discovered that GnuPG before 2.2.8 improperly handled certain
command line parameters. A remote attacker could use this to spoof the output
of GnuPG and cause unsigned e-mail to appear signed. (CVE-2018-12020)

It was discovered that python-gnupg incorrectly handled the GPG passphrase. A
remote attacker could send a specially crafted passphrase that would allow them
to control the output of encryption and decryption operations. (CVE-2019-6690)

Update instructions

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

Ubuntu 19.04
    python-gnupg - 0.4.3-1ubuntu1.19.04.1
    python3-gnupg - 0.4.3-1ubuntu1.19.04.1
Ubuntu 18.10
    python-gnupg - 0.4.1-1ubuntu1.18.10.1
    python3-gnupg - 0.4.1-1ubuntu1.18.10.1
Ubuntu 18.04 LTS
    python-gnupg - 0.4.1-1ubuntu1.18.04.1
    python3-gnupg - 0.4.1-1ubuntu1.18.04.1

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.


  o CVE-2018-12020
  o CVE-2019-6690

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