USN-3675-3: GnuPG vulnerability

18 June 2018

gnupg vulnerability

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

  • Ubuntu 12.04 ESM

Summary

GnuPG could be made to incorrectly interpret the status of the cryptographic operation if it received specially crafted file.

Software Description

  • gnupg - GNU privacy guard - a free PGP replacement

Details

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)

Update instructions

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

Ubuntu 12.04 ESM
gnupg - 1.4.11-3ubuntu2.11

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.

References