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AUSCERT External Security Bulletin Redistribution
ESB-2015.0688
Cisco AnyConnect Secure Mobility Client Arbitrary Code
Execution Vulnerability
20 March 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco AnyConnect Secure Mobility Client
Publisher: Cisco Systems
Operating System: Windows
Linux variants
OS X
Mobile Device
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2015-0664
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=37861
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Vulnerability Alert
Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability
Threat Type: CWE-20: Input Validation
IntelliShield ID: 37861
Version: 1
First Published: 2015 March 14 05:09 GMT
Last Published: 2015 March 14 05:09 GMT
Port: Not available
CVE: CVE-2015-0664
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Moderate Damage
CVSS Base: 4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal: 3.9
Version Summary: Cisco AnyConnect Secure Mobility Client contains a
vulnerability that could allow an authenticated, local attacker to execute
arbitrary code, gain access to sensitive information, or cause a denial of
service condition. Updates are not available.
Description
A vulnerability in the inter-process communication (IPC) channel of Cisco
AnyConnect Secure Mobility Client could allow an authenticated, local attacker
to execute arbitrary code.
The vulnerability is due to a lack of input sanitization of certain IPC
commands. An attacker could exploit this vulnerability by sending crafted
messages over the IPC channel. A successful exploit could allow the attacker
to write to arbitrary user space memory. This could allow an attacker to
execute arbitrary code, disclose information, or crash the AnyConnect
application.
Cisco has confirmed the vulnerability in a security notice; however, software
updates are not available.
Warning Indicators
At the time this alert was first published, Cisco AnyConnect Secure Mobility
Client versions 4.0(.00051) and prior were vulnerable. Later versions of Cisco
AnyConnect Secure Mobility Client may also be vulnerable.
IntelliShield Analysis
To exploit this vulnerability, an attacker must authenticate and have local
access to the system. These requirements may reduce the likelihood of a
successful exploit.
Cisco indicates through the CVSS score that proof-of-concept code exists;
however, the code is not known to be publicly available.
Vendor Announcements
Cisco has released bug ID CSCus79195 for registered users that contains
additional details and an up-to-date list of affected product versions.
Impact
An authenticated, local attacker could exploit this vulnerability to execute
arbitrary code, gain access to sensitive information, or cause the affected
application to crash, resulting in a denial of service (DoS) condition.
Technical Information
The vulnerability is due to insufficient sanitization of certain IPC commands
submitted to an affected system.
An authenticated, local attacker could exploit this vulnerability by sending
crafted messages over the IPC channel to the targeted system. A successful
exploit could allow the attacker to write to arbitrary user space memory that
could be leveraged by the attacker to execute arbitrary code, gain access to
sensitive information, or cause a DoS condition.
Safeguards
Administrators are advised to contact the vendor regarding future updates and
releases.
Administrators are advised to allow only trusted users to access local
systems.
Administrators are advised to allow only privileged users to access
administration or management 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 AnyConnect Secure Mobility Client 2.0 .0343 | 2.1 .0148 | 2.2
.0133, .0136, .0140 | 2.3 .0185,
.0254, .1003, .2016 | 2.4 .0202,
.1012 | 2.5 Base, .0217, .2006,
.2010, .2011, .2014, .2017,
.2018, .2019, .3041, .3046,
.3051, .3054, .3055 | 3.0 Base,
.0629, .1047, .2052, .3050,
.3054, .4235, .5075, .5080,
.09231, .09266, .09353 | 3.1
Base, .02043, .05182, .05187,
.06073 | 4.0 .00048, .00051
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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