ESB-2017.2496 - [Cisco] Cisco Adaptive Security Appliance (ASA): Multiple vulnerabilities 2017-10-05

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2496
     Cisco Adaptive Security Appliance Software Multiple Vulnerability
                              5 October 2017

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

Product:           Cisco Adaptive Security Appliance (ASA)
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service    -- Remote/Unauthenticated      
                   Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12265 CVE-2017-12246 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-asa
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-asa1

Comment: This bulletin contains two (2) Cisco Systems security advisories.

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Cisco Adaptive Security Appliance Software Direct Authentication Denial of 
Service Vulnerability

High

Advisory ID: 
cisco-sa-20171004-asa

First Published: 
2017 October 4 16:00 GMT

Version 1.0: 
Final

Workarounds: 
No workarounds available

Cisco Bug IDs: 
CSCvd59063

CVSS Score: Base 8.6

CVE-2017-12246
CWE-399

Summary

A vulnerability in the implementation of the direct authentication feature in
Cisco Adaptive Security Appliance (ASA) Software could allow an 
unauthenticated, remote attacker to cause an affected device to unexpectedly 
reload, resulting in a denial of service (DoS) condition.

The vulnerability is due to incomplete input validation of the HTTP header. An
attacker could exploit this vulnerability by sending a crafted HTTP request to
the local IP address of an affected device. A successful exploit could allow 
the attacker to cause the affected device to reload.

Note: Only traffic directed to the affected system can be used to exploit this
vulnerability. This vulnerability affects systems that have the direct 
authentication feature enabled. This vulnerability can be triggered by IPv4 or
IPv6 traffic.

Cisco has released software updates that address this vulnerability. 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-20171004-asa

Affected Products

Vulnerable Products

This vulnerability affects Cisco Adaptive Security Appliance (ASA) Software 
that is running on the following Cisco products:

    ASA 5500 Series Adaptive Security Appliances
    ASA 5500-X Series Next-Generation Firewalls
    ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600
        Series Routers
    ASA 1000V Cloud Firewall
    Adaptive Security Virtual Appliance (ASAv)
    Firepower 4110 Security Appliance
    Firepower 9300 ASA Security Module
    ISA 3000 Industrial Security Appliance

For information about which software releases are vulnerable, see the Fixed 
Software section of this advisory.

This vulnerability affects devices that are running a vulnerable release of 
Cisco ASA Software and have direct authentication enabled. The vulnerability 
only applies to HTTP access over the web management interface, telnet access 
with direct authentication is not vulnerable.

Direct Authentication

To determine whether direct authentication is enabled, administrators can use
the show running-config | include "aaa authentication listener" command in the
CLI and verify that the command returns output.

The following example shows the output of the command for a device that is 
running Cisco ASA Software and has direct authentication enabled:

    ciscoasa# show running-config | include "aaa authentication listener"
    aaa authentication listener http inside port 5555

For additional information, refer to the configuration example in the Direct 
Authentication section of the Cut-Through and Direct ASA Authentication 
Configuration Example document.

Determining the Running Software Release

To determine whether a vulnerable version of Cisco ASA Software is running on
a device, administrators can use the show version command in the CLI. The 
following example shows the output of the command for a device that is running
Cisco ASA Software Release 9.2(1):

    ciscoasa# show version | include Version
    Cisco Adaptive Security Appliance Software Version 9.2(1)
    Device Manager Version 7.4(1)

Customers who use Cisco Adaptive Security Device Manager (ASDM) to manage 
devices can locate the software release in the table that appears in the login
window or the upper-left corner of the Cisco ASDM window.

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 platforms:

    Firepower 2100 Series Security Appliance
    Firepower Threat Defense Software

Workarounds

There are no workarounds that address this vulnerability.

Fixed Software

Cisco has released free software updates that address the vulnerability 
described in this advisory. Customers may only install and expect support for
software versions and feature sets for which they have purchased a license. By
installing, downloading, accessing, or otherwise using such software upgrades,
customers agree to follow the terms of the Cisco software license: 
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html

Additionally, customers may only download software for which they have a valid
license, procured from Cisco directly, or through a Cisco authorized reseller
or partner. In most cases this will be a maintenance upgrade to software that
was previously purchased. Free security software updates do not entitle 
customers to a new software license, additional software feature sets, or 
major revision upgrades.

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 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.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service 
contract and customers who make purchases through third-party vendors but are
unsuccessful in obtaining fixed software through their point of sale should 
obtain upgrades by contacting the Cisco TAC: 
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html

Customers should have the product serial number available and be prepared to 
provide the URL of this advisory as evidence of entitlement to a free upgrade.

Fixed Releases

In the following table, the left column lists major releases of Cisco ASA 
Software. The right column indicates whether a major release is affected by 
the vulnerability described in this advisory and the first release that 
includes the fix for this vulnerability. Customers should upgrade to an 
appropriate release as indicated in this section.

Cisco ASA Major Release 	First Fixed Release
Prior to 9.1[1] 		Affected, migrate to 9.1.7.17 or later
9.1 				9.1.7.17 or later
9.2 				9.2.4.20 or later
9.3[1] 				Affected, migrate to 9.4.4.6
9.4 				9.6.3 or later
9.5[1]				9.5.3.9 or later
9.6 				9.6.3 or later
9.7 				9.7.1.8 or later
9.8 				9.8.1 or later

[1]Cisco ASA Software releases prior to 9.1 and Cisco ASA releases 9.3 and 9.5
have reached End of Software Maintenance. Customers should migrate to a 
supported release.

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.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-asa

Revision History

Version Description 		Section 	Status 	Date
1.0 	Initial public release. - 		Final 	2017-October-04

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Cisco Adaptive Security Appliance Software HREF Cross-Site Scripting 
Vulnerability

Medium

Advisory ID: 
cisco-sa-20171004-asa1

First Published: 
2017 October 4 16:00 GMT

Version 1.0: 
Final Workarounds: No workarounds available

Cisco Bug IDs: 
CSCve91068

CVSS Score: 
Base 6.1

CVE-2017-12265
CWE-79

Summary

A vulnerability in the web-based management interface of Cisco Adaptive 
Security Appliance (ASA) Software could allow an unauthenticated, remote 
attacker to conduct a cross-site scripting (XSS) attack against a user of the
web-based management interface of an affected device.

The vulnerability is due to insufficient validation of user-supplied input by
the web-based management interface of an affected device. An attacker could 
exploit this vulnerability by persuading a user of the interface to click a 
crafted link. A successful exploit could allow the attacker to execute 
arbitrary script code in the context of the interface or allow the attacker to
access sensitive browser-based information.

Additional information about XSS attacks and potential mitigations can be 
found at:

    
https://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss

    https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)

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-20171004-asa1

Affected Products

Vulnerable Products

The vulnerability exists in the Cisco Adaptive Security Appliance (ASA) 
Software when the WEBVPN feature is enabled. The following two commands in the
configuration file indicate that the WEBVPN feature is enabled:

    webvpn
       enable outside

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.

Source

This vulnerability was found during resolution of a Cisco TAC support case.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-asa1

Revision History

Version Description 		Section 	Status 	Date
1.0 	Initial public release. - 		Final 	2017-October-04

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