Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-4528

Severity CVSS v4.0:
Pending analysis
Type:
CWE-399 Resource Management Errors
Publication date:
20/12/2011
Last modified:
11/04/2025

Description

Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:unbound:unbound:*:*:*:*:*:*:*:* 1.4.13 (including)
cpe:2.3:a:unbound:unbound:0.0:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.1:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.2:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.3:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.4:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.5:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.6:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.7:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.7.2:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.8:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.09:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.10:*:*:*:*:*:*:*
cpe:2.3:a:unbound:unbound:0.11:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools