CVE-2018-9234

Publication date 3 April 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

GnuPG 2.2.4 and 2.2.5 does not enforce a configuration in which key certification requires an offline master Certify key, which results in apparently valid certifications that occurred only with access to a signing subkey.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnupg	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
gnupg2	18.04 LTS bionic	Fixed 2.2.4-1ubuntu1.1
	17.10 artful	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

mdeslaur

only affects 2.1.21 and later

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
gnupg2	Upstream: https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=a17d2d1f690ebe5d005b4589a5fe378b6487c657

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N