Input validation error in PowerDNS Recursor - CVE-2006-4252
Published: July 20, 2017 / Updated: June 21, 2025
Vulnerability identifier: #VU111729
CSH Severity: Medium
CVSS v4.0:
CVE-ID: CVE-2006-4252
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PowerDNS.COM B.V.
Affected software:
PowerDNS Recursor
PowerDNS Recursor
Detailed vulnerability description
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.
How to mitigate CVE-2006-4252
Install update from vendor's website.
Sources
- http://doc.powerdns.com/powerdns-advisory-2006-02.html
- http://lists.suse.com/archive/suse-security-announce/2006-Nov/0007.html
- http://secunia.com/advisories/22824
- http://secunia.com/advisories/22976
- http://www.securityfocus.com/bid/21037
- http://www.vupen.com/english/advisories/2006/4484
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30257