Vulnerability Report

CVE-2009-3602

Title: Nlnetlabs Unbound Cryptographic Failures

Other

Proof Of Concept

No public PoC currently indexed for CVE-2009-3602.

CWE Category CWE-310

Published Date Oct 13, 2009

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 7.5 CVSS v2.0

Exploit Probability (EPSS)

2.98%

Vulnerability Summary

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.

Impacted Vendors

nlnetlabs 1

unbound 1

fedoraproject 1

Reference Links

http://osvdb.org/58836 http://secunia.com/advisories/36996 http://secunia.com/advisories/37913 http://unbound.net/pipermail/unbound-users/2009-October/000852.html 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/53729 http://osvdb.org/58836 http://secunia.com/advisories/36996 http://secunia.com/advisories/37913 http://unbound.net/pipermail/unbound-users/2009-October/000852.html 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/53729

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2009-3602 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 09, 2025 MODIFIED

Vulnerability data or affected products updated.

October 13, 2009 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.