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Ubuntu 18.04 LTS USN-7730-1 PIM Messagelib Critical Email Issue

Several security issues were fixed in PIM Messagelib.. ========================================================================== 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 astandard 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 . Serious security flaws have been identified in PIM Messagelib on Ubuntu 18.04 LTS that urgently need to be addressed to avert potential data breaches.. PIM Messagelib, Ubuntu vulnerabilities, email leak, data exposure, critical issues. . Severity: Critical. LinuxSecurity.com Team

Sep 03, 2025 •Critical Ubuntu