nginx 0.6.18/1.9.9 DNS CNAME Record use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in nginx 0.6.18/1.9.9. It has been rated as problematic. This affects an unknown function of the component DNS CNAME Record Handler. The manipulation leads to use after free. This vulnerability is traded as CVE-2016-0746. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in nginx 0.6.18/1.9.9 (Web Server). This issue affects an unknown function of the component DNS CNAME Record Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was shared 01/29/2016 (Website). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2016-0746 since 12/16/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not 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 350047 (Amazon Linux Security Advisory for ngnix: ALAS-2016-655).

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 (110282), Tenable (88503), SecurityFocus (BID 82230†), SecurityTracker (ID 1034869†) and Vulnerability Center (SBV-56617†). The entries VDB-80758 and VDB-80760 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

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: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

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-2016-0746 (🔍)
GCVE (CVE): GCVE-0-2016-0746
GCVE (VulDB): GCVE-100-80759
X-Force: 110282 - Nginx DNS Processing denial of service
SecurityFocus: 82230 - nginx Multiple Denial of Service Vulnerabilities
SecurityTracker: 1034869
Vulnerability Center: 56617 - Nginx before 1.8.1 and 1.9.x before 1.9.10 Remote DoS or Other Impact via a Crafted DNS Response, High

See also: 🔍

Entryinfo

Created: 02/02/2016 09:54
Updated: 07/06/2022 17:06
Changes: 02/02/2016 09:54 (69), 08/23/2018 07:19 (20), 07/06/2022 17:06 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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