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[USN-9087-1] signing-party vulnerability

Posted on 13 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9087-1
November 12, 2026

signing-party vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- signing-party: Various OpenPGP related tools

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.

Update instructions:

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

Ubuntu 18.04 LTS
signing-party 2.7-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
signing-party 2.2-1ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-9087-1
CVE-2019-11627

--===============4703595171879081593==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

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