Input validation error in kmail - CVE-2019-10732
Published: April 7, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU36020
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-10732
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
kmail
Ubuntu
kdepim (Ubuntu package)
kf5-messagelib (Ubuntu package)
Ubuntu
kdepim (Ubuntu package)
kf5-messagelib (Ubuntu package)
How to mitigate CVE-2019-10732
Install update from vendor's website.
kdepim (Ubuntu package) - addressed in versions 4:4.13.3-0ubuntu0.2+esm1, 4:15.12.3-0ubuntu1.1+esm1
kf5-messagelib (Ubuntu package) - update to 4:17.12.3-0ubuntu3+esm1
kf5-messagelib (Ubuntu package) - update to 4:17.12.3-0ubuntu3+esm1