USN-9087-1: signing-party vulnerability

Publication date

12 November 2026

Overview

signing-party could be made to run programs as your login if it processed a specially crafted OpenPGP key.


Packages

Details

It was discovered that the gpg-key2ps tool in signing-party did not
properly sanitize user IDs before passing them to a shell. If a user were
tricked into processing a specially crafted OpenPGP key, an attacker could
possibly use this issue to execute arbitrary commands.

It was discovered that the gpg-key2ps tool in signing-party did not
properly sanitize user IDs before passing them to a shell. If a user were
tricked into processing a specially crafted OpenPGP key, an attacker could
possibly use this issue to execute arbitrary commands.

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
18.04 LTS bionic signing-party –  2.7-1ubuntu0.1~esm1  
16.04 LTS xenial signing-party –  2.2-1ubuntu0.1~esm1

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