copyright | disclaimer | privacy | contact  
Australia's Leading Computer Emergency Response Team
 
Search this site

 
On this site

 > HOME
 > About AusCERT
 > Membership
 > Contact Us
 > PKI Services
 > Publications
 > Sec. Bulletins
 > Conferences
 > News & Media
 > Services
 > Web Log
 > Site Map
 > Site Help
 > Member login





 

ESB-2016.0160 - [Cisco] Cisco Web Security Appliance: Unauthorised access - Remote/unauthenticated

Date: 22 January 2016

Click here for printable version
Click here for PGP verifiable version
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0160
        Cisco Web Security Appliance Security Bypass Vulnerability
                              22 January 2016

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

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

Product:           Cisco Web Security Appliance
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1296  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160119-wsa

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Security Advisory

Cisco Web Security Appliance Security Bypass Vulnerability

Medium

Advisory ID:

cisco-sa-20160119-wsa

Published:

2016 January 19 08:00 GMT

Version 1.0:

Final

CVSS Score:

Base - 5.0

Workarounds:

No workarounds available

Cisco Bug IDs:

CSCuw32090

CSCux00848

CVE-2016-1296

CWE-264

A vulnerability in the proxy engine of the Cisco Web Security Appliance (WSA)
could allow an unauthenticated, remote attacker to bypass security 
restrictions.

The vulnerability is due to improper handling of malformed HTTP methods. An 
attacker could exploit this vulnerability by crafting an improper HTTP method.
A successful exploit could allow the attacker to circumvent WSA functionality
that prevents proxied network traffic.

Cisco released software updates that address this vulnerability. There are no
workarounds that mitigate this vulnerability.

This advisory is available at the following link: 
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160119-wsa

Vulnerable Products

Cisco Web Security Appliance (WSA) versions 8.5.3-055, 9.1.0-000, and 
9.5.0-235 are vulnerable.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this 
vulnerability.

There are no workarounds that mitigate this vulnerability.

When considering software upgrades, customers are advised to consult the Cisco
Security Advisories and Responses archive at http://www.cisco.com/go/psirt and
review subsequent advisories to determine exposure and a complete upgrade 
solution.

In all cases, customers should ensure that the devices to upgrade 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.

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.

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160119-wsa

Version	Description 		Section	Status	Date

1.0	Initial public release.	-	Final	2016-January-19

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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=mX/u
-----END PGP SIGNATURE-----