Input validation error in Roundcube Webmail - CVE-2019-10740
Published: April 7, 2019 / Updated: August 4, 2020
Vulnerability identifier: #VU33722
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-10740
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 Roundcube Webmail before 1.3.10, 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
Roundcube Webmail
roundcubemail (Alpine package)
SUSE Linux
Opensuse
roundcubemail (Alpine package)
SUSE Linux
Opensuse
How to mitigate CVE-2019-10740
Install update from vendor's website.
Roundcube Webmail - update to 1.3.10
roundcubemail (Alpine package) - update to 1.3.10-r0
roundcubemail (Alpine package) - update to 1.3.10-r0