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) 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.




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



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