GnuPG could be made to incorrectly interpret the status of the cryptographic operation if it received specially crafted file.
USN-3675-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM.
18 June 2018
A security issue affects these releases of Ubuntu and its derivatives:
GnuPG could be made to incorrectly interpret the status of the cryptographic operation if it received specially crafted file.
USN-3675-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM.
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. (CVE-2018-12020)
The problem can be corrected by updating your system to the following package versions:
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.
Vulmon