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Secunia Advisory SA37710

Cisco ASA WebVPN Bookmark URLs Security Bypass
Secunia Advisory SA37710
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Release Date 2009-12-17
Last Update 2009-12-31
   
Popularity 3,293 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Security Bypass
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Workaround
   
   
3rd party PoC/exploit Link available in Customer Area
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
Cisco Adaptive Security Appliance (ASA) 7.x
Cisco Adaptive Security Appliance (ASA) 8.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2009-4455 CVSS available in Customer Area
  

Description

David Eduardo Acosta Rodriguez has reported a security issue in Cisco ASA, which can be exploited by malicious users to bypass certain security restrictions.

The security issue is caused due to the appliance allowing administrators the option to limit web access via the VPN through obfuscated bookmark URLs. This can be exploited to access apparently restricted URLs obfuscated using the ROT13 cipher.


Solution
Apply web access control lists to group-policies and Dynamic Access Policies. Please see the vendor's advisory for details.

Provided and/or discovered by
David Eduardo Acosta Rodriguez, ISecAuditors

Changelog
Further details available in Customer Area

Original Advisory
ISecAuditors:
http://archives.neohapsis.com/archives/fulldisclosure/2009-12/0385.html

Cisco:
http://tools.cisco.com/security/center/viewAlert.x?alertId=19609

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Cisco ASA WebVPN Bookmark URLs Security Bypass
 
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