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Ubuntu Security Notice USN-3675-3

Ubuntu Security Notice USN-3675-3
Posted Jun 18, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3675-3 - USN-3675-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM. 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
SHA-256 | 9587c69c7756e324145670c1fa02e480461438c991a57a910589e604dd2916be

Ubuntu Security Notice USN-3675-3

Change Mirror Download
==========================================================================
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://usn.ubuntu.com/usn/usn-3675-3
https://usn.ubuntu.com/usn/usn-3675-1
CVE-2018-12020
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