Executive Summary

Summary
Title Unbound vulnerability
Informations
Name USN-2484-1 First vendor Publication 2015-01-26
Vendor Ubuntu Last vendor Modification 2015-01-26
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10 - Ubuntu 14.04 LTS

Summary:

Unbound could be made to consume resources if it received specially crafted network traffic.

Software Description: - unbound: validating, recursive, caching DNS resolver

Details:

Florian Maury discovered that Unbound incorrectly handled delegation. A remote attacker could possibly use this issue to cause Unbound to consume resources, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.10:
libunbound2 1.4.22-1ubuntu4.14.10.1
unbound 1.4.22-1ubuntu4.14.10.1

Ubuntu 14.04 LTS:
libunbound2 1.4.22-1ubuntu4.14.04.1
unbound 1.4.22-1ubuntu4.14.04.1

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2484-1
CVE-2014-8602

Package Information:
https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.10.1
https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-2484-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-399 Resource Management Errors

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:28332
 
Oval ID: oval:org.mitre.oval:def:28332
Title: DSA-3097-1 -- unbound security update
Description: Florian Maury from ANSSI discovered that unbound, a validating, recursive, and caching DNS resolver, was prone to a denial of service vulnerability. An attacker crafting a malicious zone and able to emit (or make emit) queries to the server can trick the resolver into following an endless series of delegations, leading to resource exhaustion and huge network usage.
Family: unix Class: patch
Reference(s): DSA-3097-1
CVE-2014-8602
Version: 3
Platform(s): Debian GNU/Linux 7.0
Debian GNU/kFreeBSD 7.0
Product(s): unbound
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 37
Os 2
Os 1

Nessus® Vulnerability Scanner

Date Description
2016-01-12 Name : The remote name server is affected by a denial of service vulnerability.
File : unbound_1_5_1.nasl - Type : ACT_GATHER_INFO
2015-12-22 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20151119_unbound_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2015-12-02 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2015-2455.nasl - Type : ACT_GATHER_INFO
2015-11-24 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2015-2455.nasl - Type : ACT_GATHER_INFO
2015-11-20 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-2455.nasl - Type : ACT_GATHER_INFO
2015-03-26 Name : The remote Debian host is missing a security update.
File : debian_DLA-107.nasl - Type : ACT_GATHER_INFO
2015-01-27 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2484-1.nasl - Type : ACT_GATHER_INFO
2014-12-26 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL15931.nasl - Type : ACT_GATHER_INFO
2014-12-26 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2014-800.nasl - Type : ACT_GATHER_INFO
2014-12-22 Name : The remote Fedora host is missing a security update.
File : fedora_2014-16647.nasl - Type : ACT_GATHER_INFO
2014-12-22 Name : The remote Fedora host is missing a security update.
File : fedora_2014-16671.nasl - Type : ACT_GATHER_INFO
2014-12-15 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3097.nasl - Type : ACT_GATHER_INFO
2014-12-09 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_10d735297f4b11e4af6600215af774f0.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2015-01-28 13:24:16
  • Multiple Updates
2015-01-26 17:21:59
  • First insertion