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AUSCERT External Security Bulletin Redistribution
ESB-2015.1330
Cisco Wide Area Application Services Server Message Block
Protocol Module Denial of Service Vulnerability
18 May 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Wide Area Application Services Server
Publisher: Cisco Systems
Operating System: Cisco
Windows
VMware ESX Server
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2015-0730
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=38864
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Vulnerability Alert
Cisco Wide Area Application Services Server Message Block Protocol Module
Denial of Service Vulnerability
Threat Type: CWE-20: Input Validation
IntelliShield ID: 38865
Version: 1
First Published: 2015 May 14 16:38 GMT
Last Published: 2015 May 14 16:38 GMT
Port: Not available
CVE: CVE-2015-0730
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Mild Damage
CVSS Base: 5.0
CVSS Temporal: 4.8
Version Summary: Cisco Wide Area Application Services contains a vulnerability
that could allow an unauthenticated, remote attacker to cause a denial of
service condition. Updates are not available.
Description
A vulnerability in the Server Message Block Protocol (SMB) module of Cisco
Wide Area Application Services (WAAS) could allow an unauthenticated, remote
attacker to cause a reload of the SMB module.
The vulnerability is due to improper input validation. An attacker could
exploit this vulnerability by sending a crafted SMB Negotiate Protocol Request
packet with an invalid field to a targeted device. A successful exploit could
allow the attacker to cause a reload of the SMB module on the device,
resulting in a partial denial of service (DoS) condition.
Cisco has confirmed the vulnerability; however, software updates are not
available.
Warning Indicators
At the time this alert was first published, Cisco WAAS release 6.0(1) was
vulnerable. Later releases Cisco WAAS may also be vulnerable.
IntelliShield Analysis
To exploit this vulnerability, an attacker may need access to trusted,
internal networks to send a crafted SMB Negotiate Protocol Request packet to
the device. This access requirement may limit the possibility of a successful
exploit.
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 CSCuo75645 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
the SMB module on an affected device to reload, resulting in a partial DoS
condition.
Technical Information
The vulnerability is due to insufficient validation of user-supplied input
processed by an affected device.
An unauthenticated, remote attacker could exploit this vulnerability by
sending a crafted SMB Negotiate Protocol Request packet with an invalid field
to a targeted device. A successful exploit could allow the attacker to cause a
reload of the SMB module on the device, resulting in a partial DoS condition.
Safeguards
Administrators are advised to contact the vendor regarding future updates and
releases.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by
using a solid firewall strategy.
Administrators may consider using IP-based access control lists (ACLs) to
allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
Patches/Software
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 Wide Area Application Services (WAAS) 6.0 (1)
Associated Products:
N/A
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are
highlighted by analysts in the Cisco Threat Operations Center and represent a
subset of the comprehensive content that is available through Cisco Security
IntelliShield Alert Manager Service. This customizable threat and
vulnerability alert service provides security staff with access to timely,
accurate, and credible information about threats and vulnerabilities that may
affect their environment.
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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