Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.
Flaw in remote ActiveSync protocol may disclose device password
Posted on 6-Aug-2005 10:26 | Tags Filed under: News


Flaw in remote ActiveSync protocol may disclose device password
Security company Airscanner has identified a problem with the way ActiveSync handles requests from password-protected devices. The problem affect Microsoft ActiveSync 3.7.1 and 3.8, and it was tested on Windows XP Professional SP2 and Windows Mobile 2003 Pocket PC.

The risk level is low for denial of service attacks, but it can be elevated to medium for password collection attack.

ActiveSync is Microsoft’s default connectivity program that keeps a desktop PC and a Pocket PC synchronized. It also includes various other features, such as debugging ability, file transfer, etc.

When a Pocket PC device attempts to sync to a PC, it will send three initial packets to the Active Sync program on port 5679.

If the equipment ID value is valid, the PC will respond with a special code. If the equipment ID is not correct, the response will be another code. With this static response, it is trivial to brute force the valid equipment ID value. The reason this is important is because if the value of the correct corresponding PID is sent, a prompt will appear on the PC asking for a PIN value.

If a target enters a password, the information will be passed back to the remote, requesting client. If a value other than x01 is sent, that value will be XORed with the response to pseudo-encrypt the password. This method of information gathering is possible from over a network and does work over the Internet. From a quick nmap scan, we found about roughly 10 computers with this port open per 50 class C subnets.

Also, if numerous attempts were made to initialize with a PC running ActiveSync, after about four attempts the ActiveSync process freezes.



More information: http://www.airscanner.com/security/activesync...




comments powered by Disqus


Trending now »

Hot discussions in our forums right now:

iPhone 8/iPhone X, impressions?
Created by surfisup1000, last reply by Brumfondl on 25-Sep-2017 21:36 (429 replies)
Pages... 27 28 29


Auckland Airport fuel supply obliterated by digger
Created by Batman, last reply by k1wi on 23-Sep-2017 03:12 (220 replies)
Pages... 13 14 15


Car pulling left - even after alignment
Created by Paul1977, last reply by Aredwood on 25-Sep-2017 22:35 (26 replies)
Pages... 2


Driving an automatic - do you use one foot or both?
Created by geekIT, last reply by Aredwood on 25-Sep-2017 22:48 (143 replies)
Pages... 8 9 10


Disappointed with transition to MyRepublic
Created by Rudster, last reply by djtOtago on 25-Sep-2017 15:43 (17 replies)
Pages... 2


When did we become America
Created by BTR, last reply by Fred99 on 22-Sep-2017 12:12 (66 replies)
Pages... 3 4 5


vodafone shutting down email?
Created by FatFurryGuy, last reply by Pumpedd on 25-Sep-2017 09:00 (298 replies)
Pages... 18 19 20


Spam Text
Created by rendezvous, last reply by hio77 on 25-Sep-2017 22:00 (24 replies)
Pages... 2