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Accellion Kiteworks contains multiple vulnerabilities

Vulnerability Note VU#305607

Original Release Date: 2016-08-26 | Last Revised: 2016-08-26


The Accellion Kiteworks appliance prior to version kw2016.03.00 contains multiple vulnerabilities.


CWE-276: Incorrect Default Permissions - CVE-2016-5662

The `/opt/bin/cli` script has setuid permissions by default, allowing an authenticated KiteWorks users to escalate privileges of commands to root. In practice, the user would likely already have administrator or root privileges.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') - CVE-2016-5663

An unauthenticated remote user may be able to conduct reflected cross-site scripting attacks using the code, error, and error_description parameters of oauth_callback.php.

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') - CVE-2016-5664

An unauthenticated remote attacker may be able to view limited sets of files outside of the webroot directory by a crafted HTTP request.

CWE-16: Configuration

According to the reporter, Accellion KiteWorks is pre-configured with insecure defaults that may allow a remote user to create an SSH tunnel for a local user and bypass typical authentication channels. The KiteWorks appliance also is configured to allow local user access without further authentication to the Apache Solr and Memcache instances.

The CVSS score below is based on CVE-2016-5664.


An unauthenticated user may be able to conduct cross-site scripting attacks or read limited files from the appliance. An authenticated user may be able to elevate privileges of commands to root.


Apply an update

Accellion has addressed these issues in KiteWorks version kw2016.03.00. Affected users are encouraged to update their software as soon as possible.

Vendor Information


Accellion Affected

Updated:  August 16, 2016



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base 9 AV:N/AC:L/Au:S/C:C/I:C/A:C
Temporal 7 E:POC/RL:OF/RC:C
Environmental 5.3 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND



Thanks to Shubham Shah for reporting this vulnerability.

This document was written by Garret Wassermann.

Other Information

CVE IDs: CVE-2016-5662, CVE-2016-5663, CVE-2016-5664
Date Public: 2016-08-23
Date First Published: 2016-08-26
Date Last Updated: 2016-08-26 15:03 UTC
Document Revision: 31

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