PowerDNS before 2.9.21.2 allows remote attackers to cause a denial of service (daemon crash) via a CH HINFO query.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Dec 8, 2008
- Updated
- Jun 16, 2026
- EPSS
- 3.4% · 88th percentile
- CWE
- CWE-16
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| powerdns | powerdns | cpe:2.3:a:powerdns:powerdns |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- powerdns powerdnsup to 2.9.21.1 inclusive
- powerdns powerdns1.99.1
- powerdns powerdns1.99.10
- powerdns powerdns1.99.11
- powerdns powerdns1.99.12
- powerdns powerdns1.99.2
- powerdns powerdns1.99.3
- powerdns powerdns1.99.4
- powerdns powerdns1.99.5
- powerdns powerdns1.99.6
- powerdns powerdns1.99.7
- powerdns powerdns1.99.8
- powerdns powerdns1.99.9
- powerdns powerdns2.0
- powerdns powerdns2.0.1
- powerdns powerdns2.1
- powerdns powerdns2.2
- powerdns powerdns2.3
- powerdns powerdns2.4
- powerdns powerdns2.5
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | pdns | before 2.9.21.2-1 | 2.9.21.2-1 |
Same product
powerdns: all recordsOther highest-scoring records for the same primary product.
- CVE-2006-2069The recursor in PowerDNS before 3.0.1 allows remote attackers to cause a denial of service (application crash) via malformed EDNS0 packets.22Monitor
- CVE-2005-0038The DNS implementation of PowerDNS 2.9.16 and earlier allows remote attackers to cause a denial of service via a compressed DNS packet with 22Monitor
- CVE-2005-2301PowerDNS before 2.9.18, when running with an LDAP backend, does not properly escape LDAP queries, which allows remote attackers to cause a d21Monitor
- CVE-2005-0428The DNSPacket::expand method in dnspacket.cc in PowerDNS before 2.9.17 allows remote attackers to cause a denial of service by sending a ran21Monitor
- CVE-2005-2302PowerDNS before 2.9.18, when allowing recursion to a restricted range of IP addresses, does not properly handle questions from clients that 8Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:pdns | 2.9.21.2-1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-16 · ConfigurationCVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- doc.powerdns.com/powerdns-advisory-2008-03.html
- lists.opensuse.org/opensuse-security-announce/2008-12/msg00002.html
- secunia.com/advisories/32979
- secunia.com/advisories/33264
- security.gentoo.org/glsa/glsa-200812-19.xml
- securitytracker.com/id?1021304
- www.securityfocus.com/bid/32627
- exchange.xforce.ibmcloud.com/vulnerabilities/47076
Vendor advisories and official records. Exploit/PoC links are deliberately left out.