The Section Header Table is the index of sections inside an ELF binary. Each entry describes one section, including its name, type, size, address, offset, and alignment. Analysts use it to understand link-time structure, symbols, relocation data, and other file contents.
What the Section Header Table Represents
The Section Header Table is the ELF file’s internal directory of sections. Each entry points to a named region and records properties such as type, size, file offset, virtual address, and alignment, making it the map analysts use to understand how the binary is organized.
This table is part of file-format structure, not runtime behavior. Its value comes from revealing what data and metadata are present in the binary, how they are laid out, and how tools can locate code, symbols, relocation records, debug information, or other section-backed content.
How Analysts Use It
Security and reverse-engineering workflows rely on the Section Header Table to separate meaningful sections from raw bytes, compare section characteristics, and understand whether the binary contains expected or unusual content. It helps explain where the loader-visible segments end and where analyst-relevant metadata begins.
For a deeper view of the surrounding ELF structure, analysts often pair section analysis with program-header and symbol interpretation. The section table helps answer “what is present,” while other ELF structures help answer “how it loads” and “what the symbols or relocation entries mean.”
Why the Details Matter
Fields in each entry are not just descriptive labels. The section name identifies purpose, the type indicates how the section should be treated, the address and offset show where it lives in memory and on disk, and alignment helps confirm whether the layout is consistent with the file’s intended use.
These details support triage, tooling, and validation. They can reveal stripped symbols, packed or obfuscated layouts, unexpected writable or executable content, or sections that do not match the binary’s declared architecture and build model.
Common Analysis Pitfalls
The section table is easy to over-trust if it is read without context. Some sections are informational, some are consumed by linkers and debuggers, and some may be absent, renamed, or manipulated without preventing execution.
Analysts should also remember that section data does not always reflect runtime reality. The loader primarily cares about program headers, so a binary can contain sections that are useful to analysts but not directly mapped into memory, or mapped in ways that differ from the file’s apparent organization.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 25, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
