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Fencer Vulns
medium 5.0

CVE-2009-4008 json

Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to caus…

published 2011-06-02 15 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3979

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to cause a denial of service (DNSSEC outage) via a crafted query.

Patch / fix

  • unbound Debian 14, Debian 13, Debian 12 1.4.4-1

debian advisories DEBIAN-CVE-2009-4008

Exploit prediction

2.70% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.