Improper Input Validation Affecting pdns-recursor package, versions <4.0.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-PDNSRECURSOR-18234828
- published23 Jul 2026
- disclosed11 Sept 2018
Introduced: 11 Sep 2018
CVE-2016-7073 (opens in a new tab)How to fix?
Upgrade Echo:latest pdns-recursor to version 4.0.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pdns-recursor package and not the pdns-recursor package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. A missing check of the TSIG time and fudge values was found in AXFRRetriever, leading to a possible replay attack.