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AUSCERT External Security Bulletin Redistribution
Cisco FireSIGHT System VPN Policy Bypass Vulnerability
7 June 2018
AusCERT Security Bulletin Summary
Product: Cisco FireSIGHT System
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2018-0333
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Cisco FireSIGHT System VPN Policy Bypass Vulnerability
Advisory ID: cisco-sa-20180606-FireSIGHT-vpn-bypass
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvh49388
CVSS Score: Base 5.8
o A vulnerability in the VPN configuration management of Cisco FireSIGHT
System Software could allow an unauthenticated, remote attacker to bypass
VPN security due to unintended side effects of dynamic configuration
changes that could allow an attacker to bypass configured policies.
The vulnerability is due to incorrect management of the configured
interface names and VPN parameters when dynamic CLI configuration changes
are performed. An attacker could exploit this vulnerability by sending
packets through an interface on the targeted device. A successful exploit
could allow the attacker to bypass configured VPN policies.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
o Vulnerable Products
This vulnerability affects Cisco FireSIGHT System Software. For information
about affected software releases, consult the Cisco bug ID(s) at the top of
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
o There are no workarounds that address this vulnerability.
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts page, to determine exposure and a
complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
o This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Subscribe to Cisco Security Notifications
| Version | Description | Section | Status | Date |
| 1.0 | Initial public release. | -- | Final | 2018-June-06 |
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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