Unbound up to 1.4.12 DNS Server resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability has been found in Unbound and classified as critical. Affected by this vulnerability is an unknown function 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. The summary by CVE is:

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.

The weakness was presented 12/20/2011 as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. This vulnerability is known as CVE-2011-4869 since 12/20/2011. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 57510 (Debian DSA-2370-1 : unbound - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian 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 (57510). See 59770 for similar entry.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 57510
Nessus Name: Debian DSA-2370-1 : unbound - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

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

12/19/2011 🔍
12/19/2011 +0 days 🔍
12/20/2011 +1 days 🔍
12/20/2011 +0 days 🔍
12/20/2011 +0 days 🔍
12/23/2011 +3 days 🔍
05/14/2013 +508 days 🔍
03/23/2015 +678 days 🔍
11/28/2021 +2442 days 🔍

Sourcesinfo

Advisory: DSA-2370
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4869 (🔍)
OVAL: 🔍

X-Force: 71868
Vulnerability Center: 39541 - Unbound Before 1.4.13p2 Allows DoS by Remote DNS Servers via a Malformed Response, High
SecurityFocus: 51115 - Unbound Multiple Denial of Service Vulnerabilities
Secunia: 47326 - Debian update for unbound, Moderately Critical
OSVDB: 77910

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/28/2021 12:08
Changes: 03/23/2015 16:50 (68), 04/29/2017 20:47 (7), 11/28/2021 11:52 (3), 11/28/2021 12:00 (1), 11/28/2021 12:08 (2)
Complete: 🔍

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