Information disclosure in Roundcube

1) Information disclosure

EUVDB-ID: #VU9172

Risk: Medium

CVSSv4.0: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2017-16651

CWE-ID: CWE-200 - Information exposure

Exploit availability: Yes

Description

The vulnerability allows a remote authenticated attacker to obtain potentially sensitive information on the target system.

The weakness exists due to insufficient validation of file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests. A remote attacker can modify the login form and submit it with valid credentials (username/password) of an email account, send a specially crafted HTTP request and gain unauthorized access to arbitrary files on the host's filesystem, including configuration files of Roundcube.

Note: the vulnerability is being actively exploited.

Mitigation

Install update from vendor's website (1.1.10, 1.2.7, 1.3.3).

Vulnerable software versions

Roundcube: 1.1.0 - 1.3.2

CPE2.3

• cpe:2.3:a:roundcube:roundcube:1.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:roundcube:roundcube:1.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:roundcube:roundcube:1.3.2:*:*:*:*:*:*:*

External links

https://roundcube.net/news/2017/11/08/security-updates-1.3.3-1.2.7-and-1.1.10

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.