CVE-2009-3602
HIGH · CVSS 7.5EPSS 3.0%EU EUVD
Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-310
- EPSS score
- 3.0% (87th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-3583)
- Published
- October 13, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-3583 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
- nlnetlabs / unbound
References
- http://osvdb.org/58836
- http://secunia.com/advisories/36996(Vendor Advisory)
- http://secunia.com/advisories/37913
- http://unbound.net/pipermail/unbound-users/2009-October/000852.html(Vendor Advisory)
- http://www.debian.org/security/2009/dsa-1963
- http://www.openwall.com/lists/oss-security/2009/10/09/2
- http://www.openwall.com/lists/oss-security/2009/10/09/3
- http://www.vupen.com/english/advisories/2009/2875(Vendor Advisory)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53729
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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