Vulnerability CVE-2011-4869
Published: 2011-12-20   Modified: 2012-02-13

Description:
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.

Type:

CWE-399

 (Resource Management Errors)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Unbound -> Unbound 

 References:
http://www.kb.cert.org/vuls/id/209659
http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
http://xforce.iss.net/xforce/xfdb/71868
http://www.debian.org/security/2011/dsa-2370
http://secunia.com/advisories/47326
http://osvdb.org/77910
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