=========================================================================Ubuntu Security Notice USN-3675-3
June 18, 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
In general, a standard system update will make all the necessary
changes.
References:
https://ubuntu.com/security/notices/USN-3675-3
https://ubuntu.com/security/notices/USN-3675-1
CVE-2018-12020
