2157
Language : Not Language-Specific (Prevalence = Undetermined)
Operating_System : Not OS-Specific (Prevalence = Undetermined)
Architecture : Not Architecture-Specific (Prevalence = Undetermined)
Technology : Processor Hardware (Prevalence = Undetermined)
Technology : Not Technology-Specific (Prevalence = Undetermined)
Common Consequences
Scope Impact Likelihood
Confidentiality
Integrity
Access Control
Authentication
Authorization
Availability
Accountability
Non-Repudiation
Gain Privileges or Assume Identity
Bypass Protection Mechanism
Execute Unauthorized Code or Commands
Modify Memory
Modify Files or Directories
The impact depends on the confidential information itself
and who is inadvertently granted access. For example, if
the confidential information is a key that can unlock all the
parts of a generation, the impact could be severe.
Medium
Detection Methods
Architecture or Design Review
Appropriate Post-Si tests should be carried out to ensure that residual confidential information is
not left on parts leaving one facility for another facility.
Effectiveness = High
Dynamic Analysis with Manual Results Interpretation
Appropriate Post-Si tests should be carried out to ensure that residual confidential information is
not left on parts leaving one facility for another facility.
Effectiveness = Moderate
Potential Mitigations
Phase: Architecture and Design
Ensure that when an OSAT vendor is allowed to access test interfaces necessary for
preproduction and returned parts, the vendor only pulls the minimal information necessary. Also,
architect the product in such a way that, when an "unlock device" request comes, it only unlocks
that specific part and not all the parts for that product line. Ensure that the product's non-volatile
memory (NVM) is scrubbed of all confidential information and secrets before handing it over to
an OSAT. Arrange to secure all communication between an OSAT facility and the chipmaker.
Effectiveness = Moderate
Demonstrative Examples
Example 1:
The following example shows how an attacker can take advantage of a piece of confidential
information that has not been protected from the OSAT.
Suppose the preproduction device contains NVM (a storage medium that by definition/design can
retain its data without power), and this NVM contains a key that can unlock all the parts for that
generation. An OSAT facility accidentally leaks the key.
Compromising a key that can unlock all the parts of a generation can be devastating to a
chipmaker.
The likelihood of such a compromise can be reduced by ensuring all memories on the
preproduction device are properly scrubbed.
CWE Version 4.14
CWE-1298: Hardware Logic Contains Race Conditions
CWE-1298: Hardware Logic Contains Race Conditions