In KDE KMail 5.2.3, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.
CVSS Details
- CVSS 3.1 Base Score: 4.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade kf5-messagelib | Jun 19, 2019 | Apr 7, 2019 |
| Suse | — | Upgrade messagelibUpgrade messagelib-develUpgrade messagelib-lang | Jan 30, 2021 | Apr 7, 2019 |
| Ubuntu | — | Upgrade libkf5templateparser5 (Ubuntu Pro)Upgrade kmail (Ubuntu Pro)Upgrade libmessageviewer4 (Ubuntu Pro)Upgrade accountwizard (Ubuntu Pro)Upgrade libtemplateparser4 (Ubuntu Pro)Upgrade libkf5mimetreeparser5abi2 (Ubuntu Pro)Upgrade libkf5templateparser5abi2 (Ubuntu Pro)Upgrade libkf5messageviewer5abi4 (Ubuntu Pro)Upgrade libkf5messageviewer5 (Ubuntu Pro) | Jul 22, 2025 | Apr 7, 2019 |
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