sqlmapproject/sqlmap · error · SqlmapNotVulnerableException

data retrieval through DNS channel failed

Error message

data retrieval through DNS channel failed

What it means

Error "data retrieval through DNS channel failed" thrown in sqlmapproject/sqlmap.

Source

Thrown at lib/techniques/dns/test.py:30

from lib.core.data import logger
from lib.core.dicts import FROM_DUMMY_TABLE
from lib.core.exception import SqlmapNotVulnerableException
from lib.techniques.dns.use import dnsUse

def dnsTest(payload):
    logger.info("testing for data retrieval through DNS channel")

    randInt = randomInt()
    kb.dnsTest = dnsUse(payload, "SELECT %d%s" % (randInt, FROM_DUMMY_TABLE.get(Backend.getIdentifiedDbms(), ""))) == str(randInt)

    if not kb.dnsTest:
        errMsg = "data retrieval through DNS channel failed"
        if not conf.forceDns:
            conf.dnsDomain = None
            errMsg += ". Turning off DNS exfiltration support"
            logger.error(errMsg)
        else:
            raise SqlmapNotVulnerableException(errMsg)
    else:
        infoMsg = "data retrieval through DNS channel was successful"
        logger.info(infoMsg)

View on GitHub (pinned to 0a35b20e39)

When it happens

Trigger: Thrown at lib/techniques/dns/test.py:30 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/422972f0b01cf1b7. Report an issue: GitHub.