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 has been found in Nlnetlabs Unbound. This affects an unknown functionality of the component Error Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.

The weakness was published 05/31/2011 as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is uniquely identified as CVE-2011-1922 since 05/09/2011. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 54978 (Fedora 14 : unbound-1.4.8-2.fc14 (2011-7555)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks.

Upgrading to version 1.2.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (67645) and Tenable (54978).

Productinfo

Vendor

• Nlnetlabs

Name

• Unbound

Version

• 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

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: 54978
Nessus Name: Fedora 14 : unbound-1.4.8-2.fc14 (2011-7555)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69758
OpenVAS Name: FreeBSD Ports: unbound
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Unbound 1.2.0

Timelineinfo

05/09/2011 🔍
05/25/2011 +16 days 🔍
05/25/2011 +0 days 🔍
05/31/2011 +6 days 🔍
05/31/2011 +0 days 🔍
06/01/2011 +1 days 🔍
06/07/2011 +6 days 🔍
06/07/2011 +0 days 🔍
03/23/2015 +1385 days 🔍
11/08/2021 +2422 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1922 (🔍)
X-Force: 67645
Vulnerability Center: 31611 - Unbound DNS Resolver before 1.4.10 Remote Denial of Service Vulnerability, Medium
SecurityFocus: 47986 - Unbound DNS Resolver Remote Denial of Service Vulnerability
Secunia: 44865 - Fedora update for unbound, Moderately Critical
OSVDB: 72750

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/08/2021 01:44
Changes: 03/23/2015 16:50 (64), 03/23/2017 07:43 (12), 11/08/2021 01:44 (3)
Complete: 🔍

Discussion

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