Operating System:

[Cisco]

Published:

09 September 2015

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.2359
        Cisco Security Management Appliance Log Rollover Denial of
                           Service Vulnerability
                             9 September 2015

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Security Management Appliance
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-6288  

Original Bulletin: 
   http://tools.cisco.com/security/center/viewAlert.x?alertId=40847

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Vulnerability Alert

Cisco Security Management Appliance Log Rollover Denial of Service
Vulnerability

Threat Type:		CWE-399: Resource Management Errors
IntelliShield ID:	40847
Version:		1
First Published:	2015 September 08 18:52 GMT
Last Published:		2015 September 08 18:52 GMT
Port:			Not available
CVE:			CVE-2015-6288
Urgency:		Unlikely Use
Credibility:		Confirmed
Severity:		Mild Damage
CVSS Base:		5.0
CVSS Temporal:		4.8

Version Summary:
Cisco Security Management Appliance contains a vulnerability that could
allow an unauthenticated, remote attacker to cause a denial of service
condition on a targeted device. Updates are not available.


Description
A vulnerability in the web interface of the Cisco Security Management
Appliance (SMA) could allow an unauthenticated, remote attacker to cause
a denial of service (DoS) condition on a targeted device.

The vulnerability is due to inadequate validation of user credentials
for incoming HTTP requests, which can cause the device to manipulate an
internal log file. An attacker could exploit this vulnerability by sending
crafted HTTP requests to the device. A successful exploit could allow
the attacker to cause a DoS condition due to an application fault. The
application fault is caused when the log file wraps quickly.

Cisco has confirmed the vulnerability; however, software updates are
not available.

Warning Indicators
At the time this alert was first published, Cisco Content Security
Management Appliance version 7.8.0-000 was affected. Later versions may
also be affected.

IntelliShield Analysis
To exploit the vulnerability, the attacker would need to send crafted HTTP
requests to the targeted system through the SMA web interface. Because the
attacker does not need to authenticate to send the crafted HTTP requests,
the likelihood of a DoS condition is increased.

Cisco indicates through the CVSS score that functional exploit code exists;
however, the code is not known to be publicly available.

Vendor Announcements
Cisco has released bug ID CSCuw09620 for registered users, which contains
additional details and an up-to-date list of affected product versions.

Impact
An unauthenticated, remote attacker could exploit this vulnerability to
cause a DoS condition on the targeted device.

Technical Information
The vulnerability is due to improper validation of user credentials for
incoming HTTP requests.

An attacker could exploit this vulnerability by sending a crafted HTTP
request to the targeted device, causing a DoS condition when a log file
wraps quickly.

Safeguards
Administrators may consider using IP-based access control lists (ACLs)
to allow only trusted systems to access the affected systems.

Administrators are advised to implement physical security for production
servers.

Administrators are advised to contact the vendor regarding future updates
and releases.

Patches/Software
Updates are not available.

Alert History

Initial Release

Product Sets

The security vulnerability applies to the following combinations of products.

Primary Products:
Cisco	Cisco Content Security Management Appliance (SMA)	7.8 Base

Associated Products:
N/A


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to
individual users; users may value alerts differently based upon their
network configurations and circumstances. THE ALERT, AND INFORMATION
CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION
CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN
RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON
OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT
NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.

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