CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

A vulnerability classified as problematic was found in Unbound. This vulnerability affects an unknown code of the component DNS Server. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was published 12/20/2011 as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability was named CVE-2011-4528 since 11/22/2011. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 71120 (GLSA-201311-18 : Unbound: Denial of Service), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks.

Upgrading to version 1.1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (71868) and Tenable (71120). Similar entry is available at 59773.

Productinfo

Name

• Unbound

Version

• 0.0
• 0.09
• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.7.1
• 0.7.2
• 0.8
• 0.10
• 0.11
• 1.0.0
• 1.0.1
• 1.0.2
• 1.1.0
• 1.1.1
• 1.2.0
• 1.2.1
• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 71120
Nessus Name: GLSA-201311-18 : Unbound: Denial of Service
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 70689
OpenVAS Name: Debian Security Advisory DSA 2370-1 (unbound)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Unbound 1.1.0

Timelineinfo

11/22/2011 🔍
12/19/2011 +27 days 🔍
12/20/2011 +1 days 🔍
12/20/2011 +0 days 🔍
12/20/2011 +0 days 🔍
12/23/2011 +3 days 🔍
12/26/2011 +3 days 🔍
11/29/2013 +704 days 🔍
03/23/2015 +479 days 🔍
11/28/2021 +2442 days 🔍

Sourcesinfo

Advisory: dsa-2370
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4528 (🔍)
OVAL: 🔍

X-Force: 71868
Vulnerability Center: 34115 - Unbound before 1.4.13p2 Remote DoS Vulnerability via a Crafted DNS Response, High
SecurityFocus: 51115 - Unbound Multiple Denial of Service Vulnerabilities
Secunia: 47326 - Debian update for unbound, Moderately Critical
OSVDB: 77909

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/28/2021 11:45
Changes: 03/23/2015 16:50 (64), 04/09/2017 13:06 (13), 11/28/2021 11:30 (3), 11/28/2021 11:37 (1), 11/28/2021 11:45 (1)
Complete: 🔍

Discussion

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