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Sprint Reveals Account Breach via Samsung Website
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tdsan
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tdsan,
User Rank: Ninja
7/21/2019 | 6:35:46 PM
Continuous monitoring could help

Information exposed in the breach includes phone number, device type, device ID, monthly recurring charges, subscriber ID, account number, account creation date, upgrade eligibility, first and last name, billing address, and add-on services

This sounds like they pulled this information from a database, the "device ID or account no" sounds like the primary key. 

Schema (P = Primary, F = ForeignKey,


AcctNo (P) | FirstName | LastName | BillingAddr | PhoneNo


DeviceID (FK) | DeviceType


AddOnSvcs | UpgradeElig | CreationDate | MoRecurringChg


So they probably extracted a DB or a number of tables from different DBs, if the DB was configured with a single service account, it would have been easy to obtain this information but the question implies the B2B relationship is way more open than public exposure. The gentleman made a statement about Risk Assessment/Mgmt, there are a number of areas that could be identified to help.

  • Setup NAC (Network Access Control), only allow specific companies
  • Implement SELinux rules to allow access to certain parts of the accounting and data server
  • Implement security token that uses cryptographic keys to access certain features of the application
  • Install Attunity to replicate a stripped down DB with specific information that they need (create an external table that is considered a "Read-Only Replica" of a table or number of tables.
  • Segment the network to allow VPN access to their Zone extranet environment (IPv6 IPSec ESP/AH VPN access)

Todd


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