USN-3964-1: python-gnupg vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 ESM

Packages

• 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

• 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

• CVE-2018-12020
• CVE-2019-6690

Related notices

• USN-3675-3: gnupg
• USN-3675-2: gnupg2, gpgv-udeb, gpgv2, scdaemon, gnupg-agent, dirmngr, gpgsm
• USN-3675-1: gpg, gpgv, gpg-wks-server, gnupg-udeb, scdaemon, gnupg-utils, gpgsm, gnupg2, gpgv-udeb, gpg-agent, gpgv2, gnupg-agent, dirmngr, gpgv-static, gpgv-win32, gnupg-l10n, gnupg, gpgconf, gpg-wks-client, gnupg-curl
• USN-4839-1: python-gnupg, python3-gnupg