• MITRE logo
  • domains
  • CAD
  • ontology
  • artifacts
  • about
  • resources
  • contribute
  • faq
  • blog
  • search
  • NSA logo
Esc

Scheduling Algorithm - EX-0012.05

(SPARTA Technique)


Definition

Spacecraft typically rely on real-time scheduling, fixed-priority or deadline/periodic schemes, driven by timers, tick sources, and per-task parameters. Threat actors target these parameters and associated tables to skew execution order and timing. Edits may change priorities, periods, or deadlines; adjust CPU budgets and watchdog thresholds; alter ready-queue disciplines; or reconfigure timer tick rates and clock sources. They may also modify task affinities, message-queue depths, and interrupt masks so preemption and latency characteristics shift. Small changes can have large effects: high-rate control loops see added jitter, estimator updates miss deadlines, command/telemetry handling starves, or low-priority maintenance tasks monopolize cores due to mis-set periods. Manipulated schedules can create intermittent, state-dependent malfunctions that are hard to distinguish from environmental load. The essence of the technique is to weaponize time, reshaping when work happens so that otherwise correct code produces unsafe or exploitable behavior.


D3FEND Inferred Relationships

Browse the D3FEND knowledge graph by clicking on the nodes below.




      
json





Use of the MITRE D3FEND™ Knowledge Graph and website is subject to the Terms of Use. Use of the MITRE D3FEND website is subject to the MITRE D3FEND Privacy Policy. MITRE D3FEND is funded by the National Security Agency (NSA) Cybersecurity Directorate and managed by the National Security Engineering Center (NSEC) which is operated by The MITRE Corporation. MITRE D3FEND; and the MITRE D3FEND logo are trademarks of The MITRE Corporation. This software was produced for the U. S. Government under Basic Contract No. W56KGU-18-D-0004, and is subject to the Rights in Noncommercial Computer Software and Noncommercial Computer Software Documentation Clause 252.227-7014 (FEB 2012)
© 2025 The MITRE Corporation.
Approved for Public Release; Distribution Unlimited #20-2338 and #23-1207.

Use of the MITRE D3FEND™ Knowledge Graph and website is subject to the Terms of Use. Use of the MITRE D3FEND website is subject to the MITRE D3FEND Privacy Policy. MITRE D3FEND is funded by the National Security Agency (NSA) Cybersecurity Directorate and managed by the National Security Engineering Center (NSEC) which is operated by The MITRE Corporation. MITRE D3FEND; and the MITRE D3FEND logo are trademarks of The MITRE Corporation. This software was produced for the U. S. Government under Basic Contract No. W56KGU-18-D-0004, and is subject to the Rights in Noncommercial Computer Software and Noncommercial Computer Software Documentation Clause 252.227-7014 (FEB 2012)
© 2025 The MITRE Corporation.
Approved for Public Release; Distribution Unlimited #20-2338 and #23-1207.

UI: 0.26.0