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AUSCERT External Security Bulletin Redistribution
ESB-2019.2996
Cisco Firepower Threat Defense Software File Policy Bypass Vulnerability
8 August 2019
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AusCERT Security Bulletin Summary
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Product: Cisco Firepower Threat Defense
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1970
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-ftd-bypass
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Cisco Firepower Threat Defense Software File Policy Bypass Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190807-ftd-bypass
First Published: 2019 August 7 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvo11350
CVE-2019-1970
CWE-693
CVSS Score:
5.8 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security
(TLS) protocol inspection engine of Cisco Firepower Threat Defense (FTD)
Software could allow an unauthenticated, remote attacker to bypass the
configured file policies on an affected system.
The vulnerability is due to errors when handling specific SSL/TLS messages.
An attacker could exploit this vulnerability by sending crafted HTTP
packets that would flow through an affected system. A successful exploit
could allow the attacker to bypass the configured file policies and deliver
a malicious payload to the protected network.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-ftd-bypass
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco products that
were running Cisco FTD Software releases earlier than Release 6.4.0 and had
file policies configured.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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
providers.
Fixed Releases
At the time of publication, Cisco FTD Software releases 6.4.0 and later
contained the fix for this vulnerability.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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.
Source
o This vulnerability was found during the resolution of a Cisco TAC support
case.
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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-ftd-bypass
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-August-07 |
+---------+--------------------------+---------+--------+-----------------+
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