CYBSEC Advisory 2010 0901 Achievo 1.4.3 (Multiple Authorization Flaws)

["CYBSEC Labs" <cybseclabs () cybsec com>]

Advisory Name: Multiple Authorization Flaws in Achievo 1.4.3 
Internal Cybsec Advisory Id: 2010-08-02 

Vulnerability Class: Authorization Flaw 

Release Date: 2010-Sept-28 

Affected Applications: Achievo 1.4.3 (other versions may be also vulnerable) 

Affected Platforms: Any 

Local / Remote: Remote 

Severity: Medium CVSS#2: 4.0 (AV:N/AC:L/Au:S/C:N/I:P/A:N) 

Researcher: Pablo G. Milano 

Vendor Status: Confirmed / Patch is available 

Reference to Vulnerability Disclosure Policy: http://www.cybsec.com/vulnerability_policy.pdf 

Vulnerability Description: 

It is possible to create and delete arbitrary activities to and from arbitrary users by modifying IDs in client 
requests. 

Proof of Concept: 

  1.. 1) To add activities as another user, just change value of the parameter "person.id" in the POST request to 
"/dispatch.php" to any other valid person ID. 
  1.. 2) To delete activities from any user: 
http://server/dispatch.php?atknodetype=timereg.hours&atkaction=delete&atkselector=hoursbase.id='XXXX' (where "XXXX? is 
the actual ID of the activity to be deleted) 

Solution: Upgrade to version 1.4.5 

Vendor Response: 

2010-Aug-04: Vendor is contacted 

2010-Aug-05: Vulnerabilities details are sent to vendor 

2010-Aug-25: Vendor informs status 

2010-Sept-27: Vendor and researcher agree publication date 

2010-Sept-28: Vulnerability public disclosure / Patch is released 

Contact Information: 

For more information regarding the vulnerability feel free to contact the researcher at 

pmilano <at> cybsec <dot> com 

About CYBSEC S.A. Security Systems 

Since 1996, CYBSEC is engaged exclusively in rendering professional services specialized in Information Security. Their 
area of services covers Latin America, Spain and over 250 customers are a proof of their professional life. 

To keep objectivity, CYBSEC S.A. does not represent, neither sell, nor is associated with other software and/or 
hardware provider companies. 

Our services are strictly focused on Information Security, protecting our clients from emerging security threats, 
maintaining their IT deployments available, safe, and reliable. 

Beyond professional services, CYBSEC is continuously researching new defense and attack techniques and contributing 
with the security community with high quality information exchange. 

For more information, please visit www.cybsec.com 

(c) 2010 - CYBSEC S.A. Security Systems

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