Weakness · High
CWE-1243: Sensitive Non-Volatile Information Not Protected During Debug
What it is
Access to security-sensitive information stored in fuses is not limited during debug.
- Severity (our rating)
- High
- Likelihood of exploit
- Not rated by MITRE
- Introduced during
- Architecture and Design, Implementation
- Exploited in the wild
- No CVE in CISA's catalog
In more detail
Several security-sensitive values are programmed into fuses to be used during early-boot flows or later at runtime. Examples of these security-sensitive values include root keys, encryption keys, manufacturing-specific information, chip-manufacturer-specific information, and original-equipment-manufacturer (OEM) data. After the chip is powered on, these values are sensed from fuses and stored in temporary locations such as registers and local memories. These locations are typically access-control protected from untrusted agents capable of accessing them. Even to trusted agents, only read-access is provided.
What an attacker can do
- Modify Memory (Confidentiality, Access Control)
- Read Memory (Confidentiality, Access Control)
- Bypass Protection Mechanism (Confidentiality, Access Control)
How to prevent it
Architecture and Design
- Disable access to security-sensitive information stored in fuses directly and also reflected from temporary storage locations when in debug mode.
H2 Security
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Start freeSource: MITRE Common Weakness Enumeration, CWE version 4.19.1. CWE is a trademark of The MITRE Corporation.