CVE-2019-10740 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00083.html https://github.com/roundcube/roundcubemail/issues/6638 https://github.com/roundcube/roundcubemail/releases/tag/1.3.10 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TFFMSO5WKEYSGMTZPZFF4ZADUJ57PRN5/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

4.3