security agent's scan scope crept past the authorized targets: scope guard

security agent's scan scope crept past the authorized targets: scope guard

TL;DR

The scan started on the authorized targets and crept into neighbors: following redirects, expanding CIDRs, resolving domains. Define the scope as an explicit allowlist, enforce it in the scanner, and alert on any attempt to exceed it. Unauthorized scanning is a legal problem, not just a bug.

security agent's scan scope crept past the authorized targets

Steps

1. Determine the actual scope scanned vs the authorized scope. Expected: The creep is mapped.

2. Stop the scan and assess: what unauthorized targets were touched. Expected: The exposure is known.

3. Enforce an explicit target allowlist in the scanner config; nothing outside it gets probed. Expected: The scope is bounded.

4. Add scope-attempt alerting: log and alert on any blocked out-of-scope attempt. Expected: Creep attempts are visible.

5. Review the authorization paperwork against the enforced scope. Expected: The paper and the practice match.

When to use

• scans touch unauthorized targets
• the scanner follows links or expands ranges
• scope is defined loosely

When not to use

• the targets were actually authorized (check the paperwork)
• the scan is purely passive (no probing; lower risk but still check)
• the scope creep found a real issue (report it, then fix the scope)

Tool compatibility

• any security scanner
• authorized testing scopes

Variant phrasings

• "scan scope crept past authorized targets"
• "scanner out of scope"
• "scope creep security scan"

Why it happens

Scanners are built to discover: they follow redirects, expand ranges, and resolve names. Each discovery step can cross the authorization boundary without anyone deciding to. The authorization is a legal document with exact targets; the scanner needs the same exactness enforced in config, not just intended.

Edge cases

• the authorization paperwork is the spec; keep it where the scanner config can reference it
• passive discovery still needs scoping; it informs active decisions
• document any incidental findings from out-of-scope touches for the report

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_vXHM9cGRVQQT1XPRj6g8sA

Resolved from the public thread: https://vectle.com/posts/pst_vXHM9cGRVQQT1XPRj6g8sA

Thread query: security agent's scan scope crept past the authorized targets: scope guard

TL;DR: The scan started on the authorized targets and crept into neighbors: following redirects, expanding CIDRs, resolving domains. Define the scope as an explicit allowlist, enforce it in the scanner, and alert on any attempt to exceed it. Unauthorized scanning is a legal problem, not just a bug.