Kerio Connect < 8.1.0 SSL/TLS Information Disclosure (BEAST)

medium Nessus Plugin ID 72393

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Synopsis

The remote mail server is affected by an information disclosure vulnerability.

Description

According to its banner, the remote host is running a version of Kerio Connect (formerly known Kerio MailServer) prior to 8.1.0. It is, therefore, affected by an information disclosure vulnerability, known as BEAST, in the SSL 3.0 and TLS 1.0 protocols due to a flaw in the way the initialization vector (IV) is selected when operating in cipher-block chaining (CBC) modes. A man-in-the-middle attacker can exploit this to obtain plaintext HTTP header data, by using a blockwise chosen-boundary attack (BCBA) on an HTTPS session, in conjunction with JavaScript code that uses the HTML5 WebSocket API, the Java URLConnection API, or the Silverlight WebClient API.

TLS 1.1, TLS 1.2, and all cipher suites that do not use CBC mode are not affected.

Solution

Upgrade to Kerio Connect 8.1.0 or later.

Plugin Details

Severity: Medium

ID: 72393

File Name: kerio_connect_810.nasl

Version: 1.8

Type: remote

Family: Misc.

Published: 2/7/2014

Updated: 12/5/2022

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: cpe:/a:kerio:connect

Required KB Items: kerio/port

Exploit Ease: No known exploits are available

Patch Publication Date: 4/30/2013

Vulnerability Publication Date: 8/31/2011

Reference Information

CVE: CVE-2011-3389

BID: 49778

CERT: 864643

Detections

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