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.
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Ubuntu Security Notice USN-3853-1
January 10, 2019
gnupg2 vulnerability
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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