1. Ubuntu Security Notices
  2. USN-3675-3

USN-3675-3: GnuPG vulnerability

Publication date

18 June 2018

Overview

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

Releases

Packages

  • 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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
12.04 precise gnupg –  1.4.11-3ubuntu2.11

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References

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