CVE-2006-4252
CVE-2006-4252 is a medium-severity vulnerability in Powerdns Recursor with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 6% (92nd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Powerdns Recursor
- Published:
- Last modified:
Description
PowerDNS Recursor 3.1.3 and earlier allows remote attackers to cause a denial of service (resource exhaustion and application crash) via a CNAME record with a zero TTL, which triggers an infinite loop.
Frequently asked questions
- What is CVE-2006-4252?
- PowerDNS Recursor 3.1.3 and earlier allows remote attackers to cause a denial of service (resource exhaustion and application crash) via a CNAME record with a zero TTL, which triggers an infinite loop.
- How severe is CVE-2006-4252?
- CVE-2006-4252 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2006-4252 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2006-4252?
- CVE-2006-4252 primarily affects Powerdns Recursor. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2006-4252?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2006-4252 published?
- CVE-2006-4252 was published on 2006-11-14 and last updated on 2026-06-16.
References
- 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
Affected products (12)
- cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.0_rc1:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.8:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.9.15:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.9.16:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.9.17:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:2.9.18:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:3.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:3.1:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:3.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:powerdns:recursor:3.1.2:*:*:*:*:*:*:*
More vulnerabilities in Powerdns Recursor
- CVE-2009-4009 — Critical (CVSS 10.0): Buffer overflow in PowerDNS Recursor before 3.1.7.2 allows remote attackers to cause a denial of service (daemon crash)…
- CVE-2020-10030 — High (CVSS 8.8): An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough…
- CVE-2025-59023 — High (CVSS 8.2): Crafted delegations or IP fragments can poison cached delegations in Recursor.
- CVE-2019-3806 — High (CVSS 8.1): An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied…
- CVE-2015-5470 — High (CVSS 7.8): The label decompression functionality in PowerDNS Recursor before 3.6.4 and 3.7.x before 3.7.3 and Authoritative (Auth)…
- CVE-2015-1868 — High (CVSS 7.8): The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and…