sqlmapproject/sqlmap · error · SystemExit

[!] cannot calibrate oracle: transport failed on a control r

Error message

[!] cannot calibrate oracle: transport failed on a control request

What it means

Error "[!] cannot calibrate oracle: transport failed on a control request" thrown in sqlmapproject/sqlmap.

Source

Thrown at extra/esperanto/__main__.py:439

    dyn = set()

    def _deReflect(body, cond):
        return body.replace(cond, "") if cond else body     # drop the reflected payload

    def _clean(body, cond):
        body = _deReflect(body, cond)
        return "\n".join(ln for ln in body.split("\n") if ln not in dyn) if dyn else body

    mode, wanted, base = None, None, {}
    if string is not None:
        mode = "string"
    elif code is not None:
        mode, wanted = "code", int(code)
    else:                                                   # auto-calibrate
        (t1, s1), (t2, s2), (f1, sf) = fetch("1=1"), fetch("1=1"), fetch("1=2")
        if t1 is None or t2 is None or f1 is None:
            raise SystemExit("[!] cannot calibrate oracle: transport failed on a control request")
        dyn = set(t1.split("\n")) ^ set(t2.split("\n"))     # varies between identical requests -> dynamic
        tc, fc = _clean(t1, "1=1"), _clean(f1, "1=2")
        if s1 == s2 and s1 != sf:                           # (1) HTTP status alone separates true/false
            mode, wanted = "code", s1
        else:
            # (2) a SHORT distinctive true-only marker: the longest contiguous chunk that is
            # in the true page but not the false one, capped to a "longish" string (never the
            # whole document) and verified stable across BOTH true baselines
            t2c = _clean(t2, "1=1")
            blocks = difflib.SequenceMatcher(None, fc, tc, autojunk=False).get_opcodes()
            chunks = sorted((tc[b1:b2].strip() for op, _a1, _a2, b1, b2 in blocks
                             if op in ("insert", "replace")), key=len, reverse=True)
            wanted = None
            for chunk in chunks:
                marker = chunk[:64]                         # bounded, distinctive marker
                if len(marker) >= 6 and marker in t2c and marker not in fc:
                    mode, wanted = "autostring", marker
                    break

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at extra/esperanto/__main__.py:439 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of sqlmapproject/sqlmap@0a35b20e39 (2026-08-26). Data as JSON: /api/errors/f0a7687bf9f84bc9. Report an issue: GitHub.