SB2019040703 - Input validation error in KDE kmail

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2019-10732)

The vulnerability allows a remote non-authenticated attacker to manipulate data.

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.

Remediation

Install update from vendor's website.

References

• https://bugs.kde.org/show_bug.cgi?id=404698
• https://lists.debian.org/debian-lts-announce/2019/06/msg00012.html