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Category:   Device (VoIP/Phone/FAX)  >   Google Android Vendors:   Google
Google Android DNS Resolver Randomization Flaw Lets Remote Users Poison the DNS Cache
SecurityTracker Alert ID:  1027291
SecurityTracker URL:  http://securitytracker.com/id/1027291
CVE Reference:   CVE-2012-2808   (Links to External Site)
Date:  Jul 24 2012
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.0.4 and prior versions
Description:   A vulnerability was reported in Google Android. A remote user can poison the DNS cache.

The res_randomid() function, which bases a return value on the process ID and the current time, is called twice in quick succession. As a result, the effective randomization is less than intended. A remote user can exploit this to return spoofed DNS responses and poison the DNS cache on the target system.

The vendor was notified on May 21, 2012.

The original advisory is available at:

http://bit.ly/MkteBx
http://blog.watchfire.com/files/androiddnsweakprng.pdf

Roee Hay of Roi Saltzman IBM Application Security Research Group reported this vulnerability.

Impact:   A remote user can poison the DNS cache.
Solution:   The vendor has issued a fix (4.1.1).
Vendor URL:  www.google.com/ (Links to External Site)
Cause:   Randomization error
Underlying OS:  

Message History:   None.


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