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AUSCERT External Security Bulletin Redistribution
ESB-2020.2581
Advisory (icsa-20-210-01) Secomea GateManager
29 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Secomea GateManager
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Overwrite Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14512 CVE-2020-14510 CVE-2020-14508
CVE-2020-14500
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-210-01
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ICS Advisory (ICSA-20-210-01)
Secomea GateManager
Original release date: July 28, 2020
Legal Notice
All information products included in https://us-cert.gov/ics are provided"as
is" for informational purposes only. The Department of Homeland Security (DHS)
does not provide any warranties of any kind regarding any information contained
within. DHS does not endorse any commercial product or service, referenced in
this product or otherwise. Further dissemination of this product is governed by
the Traffic Light Protocol (TLP) marking in the header. For more information
about TLP, see https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 10.0
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Secomea
o Equipment: GateManager
o Vulnerabilities: Improper Neutralization of Null Byte or NUL Character,
Off-by-one Error, Use of Hard-coded Credentials, Use of Password Hash with
Insufficient Computational Effort
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow a remote attacker
to gain remote code execution on the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of GateManager, a VPN server, are affected:
o All versions prior to 9.2c
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF NULL BYTE OR NUL CHARACTER CWE-158
An attacker can send a negative value and overwrite arbitrary data.
CVE-2020-14500 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/C:H
/I:H/A:H ).
3.2.2 OFF-BY-ONE ERROR CWE-193
The affected product is vulnerable to an off-by-one error, which may allow an
attacker to remotely execute arbitrary code or cause a denial-of-service
condition.
CVE-2020-14508 has been assigned to this vulnerability. A CVSS v3 base score of
8.1 has been assigned; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/C:H/
I:H/A:H ).
3.2.3 USE OF HARD-CODED CREDENTIALS CWE-798
The affected product contains a hard-coded credential for telnet, allowing an
unprivileged attacker to execute commands as root.
CVE-2020-14510 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:H ).
3.2.4 USE OF PASSWORD HASH WITH INSUFFICIENT COMPUTATIONAL EFFORT CWE-916
The affected product uses a weak hash type, which may allow an attacker to view
user passwords.
CVE-2020-14512 has been assigned to this vulnerability. A CVSS v3 base score of
9.1 has been assigned; the CVSS vector string is (A V:N/AC:L/PR:N/UI:N/S:U/C:H/
I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Denmark
3.4 RESEARCHER
Sharon Brizinov and Tal Keren of Claroty reported these vulnerabilities to
CISA.
4. MITIGATIONS
Secomea has released a new version to mitigate the reported vulnerabilities.
The most up-to-date release at the time of this CISA advisory can be found on
the Secomea website .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . 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
on the ICS webpage on us-cert.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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