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Secunia Advisory SA16283

Microsoft ActiveSync Denial of Service and Equipment ID Enumeration
Secunia Advisory SA16283
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Release Date 2005-08-02
Last Update 2005-08-05
   
Popularity 10,417 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Security Bypass
Exposure of system information
Exposure of sensitive information
DoS
Where From local network
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Unpatched
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia VIM
   
Software:
Microsoft ActiveSync 3.x

Secunia CVSS Score Available in Customer Area
CVE Reference(s) No CVE references.

  

Description

Some vulnerabilities have been reported in Microsoft ActiveSync, which can be exploited by malicious people to cause a DoS (Denial of Service), enumerate valid equipment IDs or bypass certain security restrictions.

1) It is possible to enumerate valid equipment IDs by examining the response via some specially crafted data sent to port 5679/tcp.

This can further be exploited to trick users into disclosing passwords for mobile devices to malicious people.

2) An error in the communication handling can be exploited to freeze the ActiveSync process by sending multiple initialization requests to port 5679/tcp.

3) ActiveSync does not enforce password authentication when network synchronisation is performed. This can be exploited to cause to a PDA to sync with a malicious ActiveSync server or by a malicious PDA to access a ActiveSync server using partnership IDs sniffed from the network.

The vulnerabilities have been reported in version 3.7.1. #3 is reported in version 3.8. Other versions may also be affected.


Solution
Restrict traffic to port 5679/tcp.
Further details available in Customer Area

Provided and/or discovered by
1-2) Seth Fogie, Airscanner Mobile Security.
3) Natalia Melnikova

Changelog
Further details available in Customer Area

Original Advisory
http://www.airscanner.com/security/activesync371.htm
http://www.security.nnov.ru/Jdocument358.html

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: Microsoft ActiveSync Denial of Service and Equipment ID Enumeration
 
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