N/A - USN-1570-1

Executive Summary

Summary
Title	GnuPG vulnerability

Informations
Name	USN-1570-1	First vendor Publication	2012-09-17
Vendor	Ubuntu	Last vendor Modification	2012-09-17
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	Not Defined	Attack Range	Not Defined
Cvss Impact Score	Not Defined	Attack Complexity	Not Defined
Cvss Expoit Score	Not Defined	Authentication	Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 12.04 LTS - Ubuntu 11.10 - Ubuntu 11.04 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS

Summary:

GnuPG could be tricked into downloading a different key when downloading from a key server.

Software Description: - gnupg: GNU privacy guard - a free PGP replacement - gnupg2: GNU privacy guard - a free PGP replacement

Details:

It was discovered that GnuPG used a short ID when downloading keys from a keyserver, even if a long ID was requested. An attacker could possibly use this to return a different key with a duplicate short key id.

Update instructions:

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

Ubuntu 12.04 LTS:
gnupg 1.4.11-3ubuntu2.1
gnupg2 2.0.17-2ubuntu2.12.04.1

Ubuntu 11.10:
gnupg 1.4.11-3ubuntu1.11.10.1
gnupg2 2.0.17-2ubuntu2.11.10.1

Ubuntu 11.04:
gnupg 1.4.11-3ubuntu1.11.04.1
gnupg2 2.0.14-2ubuntu1.2

Ubuntu 10.04 LTS:
gnupg 1.4.10-2ubuntu1.1
gnupg2 2.0.14-1ubuntu1.4

Ubuntu 8.04 LTS:
gnupg 1.4.6-2ubuntu5.1
gnupg2 2.0.7-1ubuntu0.2

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

References:
http://www.ubuntu.com/usn/usn-1570-1
https://launchpad.net/bugs/1016643

Package Information:
https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu2.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.17-2ubuntu2.12.04.1
https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu1.11.10.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.17-2ubuntu2.11.10.1
https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu1.11.04.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.14-2ubuntu1.2
https://launchpad.net/ubuntu/+source/gnupg/1.4.10-2ubuntu1.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.14-1ubuntu1.4
https://launchpad.net/ubuntu/+source/gnupg/1.4.6-2ubuntu5.1
https://launchpad.net/ubuntu/+source/gnupg2/2.0.7-1ubuntu0.2