Accellion FTP server contains information exposure and cross-site scripting vulnerabilities

Overview

The Accellion FTP server prior to version FTA_9_12_220 is vulnerable to cross-site scripting and information exposure.

Description

CWE-204**: Response Discrepancy Information Exposure**** -**CVE-2016-9499

Accellion FTP server only returns the username in the server response if the a username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.

CWE-80**: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)**** -**CVE-2016-9500

Accellion FTP server uses the Accusoft Prizm Content flash component, which contains multiple parameters (customTabCategoryName, customButton1Image) that are vulnerable to cross-site scripting.

For more information, please see Qualys’s security advisory.

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Impact

A remote attacker may be able to enumerate user accounts on the Accellion FTP server or may conduct reflected cross-site scripting attacks.

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Solution

Apply an update

Both issues have been addressed in the most recent version FTA_9_12_220, released on 31 January 2017. Previously, CVE-2016-9500 was addressed in FTA_9_12_160 released on 29 November 2016.

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Vendor Information

745607

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Accellion Affected

Notified: December 09, 2016 Updated: January 20, 2017

Status

Affected

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	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N
Temporal	3.4	E:POC/RL:OF/RC:C
Environmental	2.5	CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

• <https://www.qualys.com/2016/12/06/qsa-2016-12-06/qsa-2016-12-06.pdf&gt;
• <http://cwe.mitre.org/data/definitions/80.html&gt;
• <http://cwe.mitre.org/data/definitions/204.html&gt;

Acknowledgements

Thanks to Ashish Kamble for reporting this vulnerability.

This document was written by Garret Wassermann.

Other Information

CVE IDs:	CVE-2016-9499, CVE-2016-9500
Date Public:	2017-01-31 Date First Published: