Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2009-3602

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.

Security Impact Summary

CVE-2009-3602 is a security vulnerability that . Impacting 1 product from nlnetlabs organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-10-13T10:30:00.657

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-310

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	nlnetlabs	unbound	≤ 1.3.3	Yes
Application	nlnetlabs	unbound	0.0	Yes
Application	nlnetlabs	unbound	0.1	Yes
Application	nlnetlabs	unbound	0.2	Yes
Application	nlnetlabs	unbound	0.3	Yes
Application	nlnetlabs	unbound	0.4	Yes
Application	nlnetlabs	unbound	0.5	Yes
Application	nlnetlabs	unbound	0.6	Yes
Application	nlnetlabs	unbound	0.7	Yes
Application	nlnetlabs	unbound	0.7.1	Yes
Application	nlnetlabs	unbound	0.7.2	Yes
Application	nlnetlabs	unbound	0.8	Yes
Application	nlnetlabs	unbound	0.09	Yes
Application	nlnetlabs	unbound	0.10	Yes
Application	nlnetlabs	unbound	0.11	Yes
Application	nlnetlabs	unbound	1.0.0	Yes
Application	nlnetlabs	unbound	1.0.1	Yes
Application	nlnetlabs	unbound	1.0.2	Yes
Application	nlnetlabs	unbound	1.1.0	Yes
Application	nlnetlabs	unbound	1.1.1	Yes
Application	nlnetlabs	unbound	1.2.0	Yes
Application	nlnetlabs	unbound	1.2.1	Yes
Application	nlnetlabs	unbound	1.3.0	Yes
Application	nlnetlabs	unbound	1.3.1	Yes
Application	nlnetlabs	unbound	1.3.2	Yes

References

http://osvdb.org/58836 ([email protected])
http://secunia.com/advisories/36996 Vendor Advisory ([email protected])
http://secunia.com/advisories/37913 ([email protected])
http://unbound.net/pipermail/unbound-users/2009-October/000852.html Vendor Advisory ([email protected])
http://www.debian.org/security/2009/dsa-1963 ([email protected])
http://www.openwall.com/lists/oss-security/2009/10/09/2 ([email protected])
http://www.openwall.com/lists/oss-security/2009/10/09/3 ([email protected])
http://www.vupen.com/english/advisories/2009/2875 Vendor Advisory ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/53729 ([email protected])
http://osvdb.org/58836 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/36996 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/37913 (af854a3a-2127-422b-91ae-364da2661108)
http://unbound.net/pipermail/unbound-users/2009-October/000852.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2009/dsa-1963 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2009/10/09/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2009/10/09/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2009/2875 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/53729 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For nlnetlabs's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.