==========================================================================
Ubuntu Security Notice USN-3964-1
May 02, 2019
python-gnupg vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 19.04
– Ubuntu 18.10
– Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in python-gnupg
Software Description:
– python-gnupg: Python wrapper for the GNU Privacy Guard
Details:
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 versions:
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
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3964-1
CVE-2018-12020, CVE-2019-6690
Package Information:
https://launchpad.net/ubuntu/+source/python-gnupg/0.4.3-1ubuntu1.19.04.1
https://launchpad.net/ubuntu/+source/python-gnupg/0.4.1-1ubuntu1.18.10.1
https://launchpad.net/ubuntu/+source/python-gnupg/0.4.1-1ubuntu1.18.04.1
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