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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-17-264-03): Digium Asterisk GUI
22 September 2017
AusCERT Security Bulletin Summary
Product: Digium Asterisk GUI
Operating System: Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Alternate Program
CVE Names: CVE-2017-14001
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Digium Asterisk GUI
Original release date: September 21, 2017
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CVSS v3 8.8
ATTENTION: Remotely exploitable/low skill level to exploit.
Equipment: Asterisk GUI
Vulnerability: Improper Neutralization of Special Elements used in an OS
The following versions of Asterisk GUI, a framework for configuring graphical
user interfaces, are affected:
Asterisk GUI 2.1.0 and prior
Successful exploitation of this vulnerability could cause an authenticated
attacker to execute arbitrary code on the device.
Asterisk GUI is no longer maintained and should not be used. Digium recommends
affected users to migrate to Digiums SwitchVox product.
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of this vulnerability. Specifically, users should:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize that VPN is only
as secure as the connected devices.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended
practices on the ICS-CERT web page. Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly
available in the ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND
An OS command injection vulnerability has been identified that may allow the
execution of arbitrary code on the system through the inclusion of OS commands
in the URL request of the program.
CVE-2017-14001 has been assigned to this vulnerability. A CVSS v3 base score
of 8.8 has been assigned; the CVSS vector string is
Davy Douhine of RandoriSec reported the vulnerability to ICS-CERT.
Critical Infrastructure Sector(s): Commercial Facilities, Communications, and
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Alabama, United States
For any questions related to this report, please contact ICS-CERT at:
Email: firstname.lastname@example.org (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
ICS-CERT continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this
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