National Cyber Awareness System

Vulnerability Summary for CVE-2011-4869

Overview

validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#209659

Name: VU#209659

Type: Patch Information

Hyperlink:http://www.kb.cert.org/vuls/id/209659

External Source: CONFIRM

Name: http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt

Type: Advisory; Patch Information

Hyperlink:http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt

External Source: XF

Name: unbound-nsec3-dos(71868)

Hyperlink:http://xforce.iss.net/xforce/xfdb/71868

External Source: DEBIAN

Name: DSA-2370

Hyperlink:http://www.debian.org/security/2011/dsa-2370

External Source: SECUNIA

Name: 47326

Hyperlink:http://secunia.com/advisories/47326

External Source: OSVDB

Name: 77910

Hyperlink:http://osvdb.org/77910

External Source: FEDORA

Name: FEDORA-2011-17337

Hyperlink:http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html

External Source: FEDORA

Name: FEDORA-2011-17282

Hyperlink:http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html