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Category:   Device (Firewall)  >   Cisco ASA Vendors:   Cisco
Cisco ASA Bugs Let Remote Users Conduct HTTP Response Splitting and Denial of Service Attacks and Obtain Potentially Sensitive Information
SecurityTracker Alert ID:  1027008
SecurityTracker URL:  http://securitytracker.com/id/1027008
CVE Reference:   CVE-2011-3285, CVE-2011-3309, CVE-2011-4006, CVE-2012-0335   (Links to External Site)
Date:  May 2 2012
Impact:   Denial of service via network, Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): ASA 5500 Series; 7.2 - 8.5
Description:   Several vulnerabilities were reported in Cisco ASA. A remote user can cause denial of service conditions. A remote user can conduct HTTP response splitting attacks. A remote user can obtain potentially sensitive information.

A remote user can exploit a CRLF injection flaw in '/+CSCOE+/logon.html' to cause the target server to return a split response [CVE-2011-3285]. A remote user can exploit this to spoof content on the target server, attempt to poison any intermediate web caches, or conduct cross-site scripting attacks. Cisco has assigned Bug ID CSCth63101 to this vulnerability. ASA 5500 series devices with software 8.0 through 8.4 are affected.

A remote user can read IKE responder traffic to obtain potentially sensitive information [CVE-2011-3309]. Cisco has assigned Bug ID CSCtt07749 to this vulnerability. ASA 5500 series devices with software 8.2 through 8.4 are affected.

A remote user can exploit a flaw in cut-through proxy authentication processing to obtain potentially sensitive information [CVE-2012-0335]. Cisco has assigned Bug ID CSCtx42746 to this vulnerability. Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 through 8.4 are affected.

A remote user can send specially crafted data to trigger a flaw in the ESMTP inspection feature and cause excessive CPU consumption on the target system [CVE-2011-4006]. Cisco has assigned Bug ID CSCtt32565 to this vulnerability. ASA 5500 series devices with software 8.2 through 8.5 are affected.

Impact:   A remote user can cause excessive CPU consumption on the target device.

A remote user can cause arbitrary content to be displayed.

A remote user may be able to poison any intermediate web caches with arbitrary content.

A remote user can obtain potentially sensitive information.

Solution:   The vendor has issued a fix.

The vendor's advisories are available at:

http://www.cisco.com/web/software/280775065/37740/ASA-805-Interim-Release-Notes.html
http://www.cisco.com/web/software/280775065/45357/ASA-825-Interim-Release-Notes.html
http://www.cisco.com/web/software/280775065/89203/ASA-843-Interim-Release-Notes.html
http://www.cisco.com/web/software/283878312/88166/ASA-851-Interim-Release-Notes.html

Vendor URL:  www.cisco.com/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  

Message History:   None.


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