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Ubuntu Security Notice USN-3853-1

Ubuntu Security Notice USN-3853-1
Posted Jan 10, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3853-1 - Ben Fuhrmannek discovered that GnuPG incorrectly handled Web Key Directory lookups. A remote attacker could possibly use this issue to cause a denial of service, or perform Cross-Site Request Forgery attacks.

tags | advisory, remote, web, denial of service, csrf
systems | linux, ubuntu
advisories | CVE-2018-1000858
MD5 | 9dff487091705ecddb0783a58af51804

Ubuntu Security Notice USN-3853-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3853-1
January 10, 2019

gnupg2 vulnerability
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

GnuPG could allow unintended access to network services.

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

Details:

Ben Fuhrmannek discovered that GnuPG incorrectly handled Web Key Directory
lookups. A remote attacker could possibly use this issue to cause a denial
of service, or perform Cross-Site Request Forgery attacks.

Update instructions:

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

Ubuntu 18.10:
gnupg 2.2.8-3ubuntu1.1
gpg-wks-client 2.2.8-3ubuntu1.1

Ubuntu 18.04 LTS:
gnupg 2.2.4-1ubuntu1.2
gpg-wks-client 2.2.4-1ubuntu1.2

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

References:
https://usn.ubuntu.com/usn/usn-3853-1
CVE-2018-1000858

Package Information:
https://launchpad.net/ubuntu/+source/gnupg2/2.2.8-3ubuntu1.1
https://launchpad.net/ubuntu/+source/gnupg2/2.2.4-1ubuntu1.2
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