Integer Overflow or Wraparound Affecting pdns package, versions <4.0.2-1
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-PDNS-18579402
- published7 Aug 2026
- disclosed1 Nov 2018
Introduced: 1 Nov 2018
CVE-2016-2120 (opens in a new tab)How to fix?
Upgrade Echo:latest pdns to version 4.0.2-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pdns package and not the pdns package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
An issue has been found in PowerDNS Authoritative Server versions up to and including 3.4.10, 4.0.1 allowing an authorized user to crash the server by inserting a specially crafted record in a zone under their control then sending a DNS query for that record. The issue is due to an integer overflow when checking if the content of the record matches the expected size, allowing an attacker to cause a read past the buffer boundary.