Input validation error in PowerDNS Recursor - CVE-2006-4251
Published: July 20, 2017 / Updated: June 21, 2025
Vulnerability identifier: #VU111730
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2006-4251
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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
Affected software
PowerDNS Recursor
How to mitigate CVE-2006-4251
Install update from vendor's website.
PowerDNS Recursor - update to 3.1.4
External References
- http://doc.powerdns.com/powerdns-advisory-2006-01.html
- http://lists.suse.com/archive/suse-security-announce/2006-Nov/0007.html
- http://secunia.com/advisories/22824
- http://secunia.com/advisories/22903
- http://secunia.com/advisories/22976
- http://www.debian.org/security/2006/dsa-1211
- http://www.securityfocus.com/bid/21037
- http://www.vupen.com/english/advisories/2006/4484
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30270