SB2017072046 - Multiple vulnerabilities in PowerDNS Recursor

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Main Vulnerability Database SB2017072046

SB2017072046 - Multiple vulnerabilities in PowerDNS Recursor

Published: July 20, 2017 Updated: June 21, 2025

Security Bulletin ID SB2017072046
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2006-4252)

CWE-ID: CWE-20 - Improper input validation

CVSSv4:


The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (resource exhaustion and application crash) via a CNAME record with a zero TTL, which triggers an infinite loop.


2) Input validation error (CVE-ID: CVE-2006-4251)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length. This vulnerability is addressed in the following product release: PowerDNS, Recursor, 3.1.4


Remediation

Install update from vendor's website.

References