Google Active Directory Sync (GADS) Tool 3.1.3 Information Disclosure

Type packetstorm
Reporter Nathaniel Carew
Modified 2013-04-03T00:00:00


                                            `Sense of Security - Security Advisory - SOS-13-001  
Release Date. 03-Apr-2013  
Last Update. -   
Vendor Notification Date. 03-Sep-2012  
Product. Google Active Directory Sync (GADS) Tool   
Platform. Windows, Linux, Solaris  
Affected versions. All versions up to 3.1.3  
Severity Rating. High  
Impact. Exposure of sensitive information  
Attack Vector. From local without authentication  
Solution Status. Upgrade to version 3.1.6  
CVE reference. CVE - not yet assigned  
Due to a weakness in the way the Java encryption algorithm  
(PBEwithMD5andDES) has been implemented in the GADS tool all   
stored credentials can be decrypted into plain-text. This  
includes all of the encrypted passwords stored in any end-users  
saved XML configuration file, such as Active Directory accounts,  
SMTP, Proxy details, LDAP and OAuth tokens, etc.  
Proof of Concept.  
Using the following information from the XML and GADS tool to  
decrypt all encrypted passwords from any XML:  
1. The hard coded salt:   
SALT[] = { -87, -101, -56, 50, 86, 53, -29, 3 }  
2. The hard coded DES interation count:   
3. The Secret key derived from the uniqueID value in the XML:   
4. The cipher-text from the XML:   
5. The algorithm: PBEwithMD5andDES  
The decrypted value is: winning!  
Upgrade to version 3.1.6  
Discovered by.  
Nathaniel Carew from Sense of Security Labs.  
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