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Ubuntu Security Notice USN-3675-2

Ubuntu Security Notice USN-3675-2
Posted Jun 14, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3675-2 - USN-3675-1 fixed a vulnerability in GnuPG 2 for Ubuntu 18.04 LTS and Ubuntu 17.10. This update provides the corresponding update for GnuPG 2 in Ubuntu 16.04 LTS and Ubuntu 14.04 LTS. Marcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2018-12020
MD5 | 7bb33630cd3b5d2a623f796ae002ea14

Ubuntu Security Notice USN-3675-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3675-2
June 15, 2018

gnupg2 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

GnuPG 2 could be made to present validity information incorrectly.

Software Description:
- gnupg2: GNU privacy guard - a free PGP replacement

Details:

USN-3675-1 fixed a vulnerability in GnuPG 2 for Ubuntu 18.04 LTS and
Ubuntu 17.10. This update provides the corresponding update for GnuPG 2
in Ubuntu 16.04 LTS and Ubuntu 14.04 LTS.

Original advisory details:

Marcus Brinkmann discovered that during decryption or verification,
GnuPG did not properly filter out terminal sequences when reporting the
original filename. An attacker could use this to specially craft a file
that would cause an application parsing GnuPG output to incorrectly
interpret the status of the cryptographic operation reported by GnuPG.

Update instructions:

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

Ubuntu 16.04 LTS:
gnupg2 2.1.11-6ubuntu2.1

Ubuntu 14.04 LTS:
gnupg2 2.0.22-3ubuntu1.4

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

References:
https://usn.ubuntu.com/usn/usn-3675-2
https://usn.ubuntu.com/usn/usn-3675-1
CVE-2018-12020

Package Information:
https://launchpad.net/ubuntu/+source/gnupg2/2.1.11-6ubuntu2.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.22-3ubuntu1.4

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