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[USN-7730-1] PIM Messagelib vulnerabilities

Posted on 03 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7730-1
September 02, 2025

kf5-messagelib vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in PIM Messagelib.

Software Description:
- kf5-messagelib: KDE PIM messaging library

Details:

Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising,
Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, and Jörg
Schwenk discovered that PIM Messagelib could be made to leak the plaintext
of S/MIME encrypted emails when retrieving external content in emails.
Under certain configurations, if a user were tricked into opening a
specially crafted email using an application linked against PIM Messagelib,
an attacker could possibly use this issue to obtain the plaintext of an
encrypted email. This update mitigates the issue by preventing automatic
loading of external content. (CVE-2017-17689)

Jens Müller, Marcus Brinkmann, Damian Poddebniak, Sebastian Schinzel,
and Jörg Schwenk discovered that PIM Messagelib could be made to leak the
plaintext of S/MIME or PGP encrypted emails. If a user were tricked into
replying to a specially crafted email using an application linked
against PIM Messagelib, an attacker could possibly use this issue to obtain
the plaintext of an encrypted email. (CVE-2019-10732)

Update instructions:

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

Ubuntu 18.04 LTS
libkf5messageviewer5abi4 4:17.12.3-0ubuntu3+esm1
Available with Ubuntu Pro
libkf5mimetreeparser5abi2 4:17.12.3-0ubuntu3+esm1
Available with Ubuntu Pro
libkf5templateparser5abi2 4:17.12.3-0ubuntu3+esm1
Available with Ubuntu Pro

After a standard system update you need to restart any applications
which use PIM Messagelib, such as KMail, to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7730-1
CVE-2017-17689, CVE-2019-10732

--===============1702405496564429789==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

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