nginx 0.6.18/1.9.9 DNS CNAME Record resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability, which was classified as critical, was found in nginx 0.6.18/1.9.9 (Web Server). Affected is an unknown functionality of the component DNS CNAME Record 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 confidentiality, integrity, and availability. CVE summarizes:

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.

The weakness was published 01/29/2016 (Website). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is traded as CVE-2016-0747 since 12/16/2015. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 88503 (FreeBSD : nginx -- multiple vulnerabilities (c1c18ee1-c711-11e5-96d6-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370107 (Red Hat nginx18-nginx Security Update (RHSA-2016:1425)).

Upgrading to version 1.8.1 eliminates this vulnerability. A possible mitigation has been published 22 hours after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 23808.

The vulnerability is also documented in the databases at X-Force (110283) and Tenable (88503). Similar entries are available at 80758, 80759 and 87719.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
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CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88503
Nessus Name: FreeBSD : nginx -- multiple vulnerabilities (c1c18ee1-c711-11e5-96d6-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703473
OpenVAS Name: Debian Security Advisory DSA 3473-1 (nginx - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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0-Day Time: 🔍
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Upgrade: nginx 1.8.1
TippingPoint: 🔍

Timelineinfo

12/16/2015 🔍
01/28/2016 +43 days 🔍
01/28/2016 +0 days 🔍
01/29/2016 +0 days 🔍
01/29/2016 +0 days 🔍
01/31/2016 +2 days 🔍
02/02/2016 +1 days 🔍
02/15/2016 +13 days 🔍
02/15/2016 +0 days 🔍
07/06/2022 +2332 days 🔍

Sourcesinfo

Advisory: RHSA-2016:1425
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0747 (🔍)
X-Force: 110283 - Nginx DNS Processing denial of service
SecurityTracker: 1034869
Vulnerability Center: 56618 - Nginx before 1.8.1 and 1.9.x before 1.9.10 Remote DoS Related to Arbitrary Name Resolution, Medium
SecurityFocus: 82230 - nginx Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 02/02/2016 09:54
Updated: 07/06/2022 17:13
Changes: 02/02/2016 09:54 (69), 08/23/2018 07:19 (21), 07/06/2022 17:13 (3)
Complete: 🔍

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