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AUSCERT External Security Bulletin Redistribution
ESB-2017.0901
Multiple vulnerabilities have been identified in Cisco
Firepower Detection Engine
6 April 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Firepower System Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-3887 CVE-2017-3885
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170405-cfpw
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170405-cfpw1
Comment: This bulletin contains two (2) Cisco Systems security advisories.
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Cisco Security Advisory
Cisco Firepower Detection Engine SSL Denial of Service Vulnerability
Medium
Advisory ID:
cisco-sa-20170405-cfpw
First Published:
2017 April 5 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvc58563
CVE-2017-3885
CWE-399
CVSS Score:
Base 6.8, Temporal 6.8
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2017-3885
CWE-399
Summary
A vulnerability in the detection engine reassembly of Secure Sockets Layer
(SSL) packets for Cisco Firepower System Software could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
condition because the Snort process consumes a high level of CPU resources.
The vulnerability is due to improper handling of an SSL packet stream. An
attacker could exploit this vulnerability by sending a crafted SSL packet
stream to the detection engine on the targeted device. An exploit could
allow the attacker to cause a DoS condition because the Snort process
consumes a high level of CPU resources. The device must be manually
reloaded to recover from this condition.
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-20170405-cfpw
Affected Products
Vulnerable Products
This vulnerability affects Cisco Firepower System Software running software
releases 6.0.0, 6.1.0, 6.2.0, or 6.2.1 when the device is configured with
an SSL policy that has at least one rule specifying traffic decryption. For
information about affected software releases, consult the Cisco bug ID(s)
at the top of this advisory.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
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
providers.
Exploitation and Public Announcements
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.
Cisco Security Vulnerability Policy
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
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170405-cfpw
Revision History
Version Description Section Status Date
1.0 Initial public release. Final 2017-April-05
Legal Disclaimer
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.
Cisco Security Vulnerability Policy
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.
- ---
Cisco Security Advisory
Cisco Firepower Detection Engine SSL Denial of Service Vulnerability
Medium
Advisory ID:
cisco-sa-20170405-cfpw1
First Published:
2017 April 5 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvb62292
CVE-2017-3887
CWE-119
CVSS Score:
Base 6.8, Temporal 6.8
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2017-3887
CWE-119
Summary
A vulnerability in the detection engine that handles Secure Sockets Layer
(SSL) packets for Cisco Firepower System Software could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
condition because the Snort process unexpectedly restarts.
The vulnerability is due to improper error handling of an SSL packet in an
established SSL connection. An attacker could exploit this vulnerability by
sending a crafted SSL packet stream to the detection engine on the targeted
device. An exploit could allow the attacker to cause a DoS condition if the
Snort process restarts, causing traffic inspection to be bypassed or
traffic to be dropped.
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-20170405-cfpw1
Affected Products
Vulnerable Products
This vulnerability affects Cisco Firepower System Software prior to the
first fixed release when it is configured with an SSL Decrypt-Resign
policy. For information about affected software releases, consult the Cisco
bug ID(s) at the top of this advisory.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Cisco has confirmed that this vulnerability does not affect the following
Cisco products:
Cisco Adaptive Security Appliance (ASA) Software
Cisco Firepower Management Center
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
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
providers.
Exploitation and Public Announcements
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
This vulnerability was found during resolution of a Cisco TAC support case.
Cisco Security Vulnerability Policy
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
Subscribe
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170405-cfpw1
Revision History
Version Description Section Status Date
1.0 Initial public release. Final 2017-April-05
Show Less
Legal Disclaimer
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.
Cisco Security Vulnerability Policy
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.
- --------------------------END INCLUDED TEXT--------------------
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