CVE-2006-4251
Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2006-4251- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2006-4251- Updated
- 2026-11-02
EUVDEUVD-2006-4239 No score
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.
- Record
EUVD-2006-4239- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xh75-hw4q-gr36 No score
Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute...
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.
- Record
GHSA-xh75-hw4q-gr36- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2006-4251- Updated
- 2026-11-02
OSVDEBIAN-CVE-2006-4251 No score
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.
- Record
DEBIAN-CVE-2006-4251- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pdnsDebian:12 |
before 2.9.20-4 | 2.9.20-4 |
pdnsDebian:13 |
before 2.9.20-4 | 2.9.20-4 |
pdnsDebian:14 |
before 2.9.20-4 | 2.9.20-4 |
pdns-recursorDebian:12 |
before 3.1.4-1 | 3.1.4-1 |
pdns-recursorDebian:13 |
before 3.1.4-1 | 3.1.4-1 |
pdns-recursorDebian:14 |
before 3.1.4-1 | 3.1.4-1 |
pdnsDebian:3.1 |
before 2.9.17-13sarge3, plus listed versions 2.9.17-132.9.17-13sarge12.9.17-13sarge2 |
2.9.17-13sarge3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2006-4251 is a high vulnerability (CVSS 7.5) in Powerdns Recursor, published November 14, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.79%, the 95th percentile. Fixed in pdns 2.9.20-4.