CWE-1312—Missing Protection for Mirrored Regions in On-Chip Fabric Firewall

Weakness Name

Missing Protection for Mirrored Regions in On-Chip Fabric Firewall

Description

The firewall in an on-chip fabric protects the main addressed region, but it does not protect any mirrored memory or memory-mapped-IO (MMIO) regions.

Few fabrics mirror memory and address ranges, where mirrored regions contain copies of the original data. This redundancy is used to achieve fault tolerance. Whatever protections the fabric firewall implements for the original region should also apply to the mirrored regions. If not, an attacker could bypass existing read/write protections by reading from/writing to the mirrored regions to leak or corrupt the original data.

Common Consequences

Scope:

Confidentiality, Integrity, Access Control

Impact:

Modify Memory, Read Memory, Bypass Protection Mechanism

Related Weaknesses

• CWE-284Improper Access Control
• CWE-1251Mirrored Regions with Different Values