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

Summaryinfo

A vulnerability, which was classified as critical, was found in nginx 1.2.0/1.3.0 on Windows. Affected is an unknown function of the component Access Restriction. The manipulation of the argument $index_allocation results in access control. This vulnerability is cataloged as CVE-2011-4963. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in nginx 1.2.0/1.3.0 on Windows (Web Server). Affected is some unknown functionality of the component Access Restriction. The manipulation of the argument $index_allocation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality. CVE summarizes:

nginx/Windows 1.3.x before 1.3.1 and 1.2.x before 1.2.1 allows remote attackers to bypass intended access restrictions and access restricted files via (1) a trailing . (dot) or (2) certain "$index_allocation" sequences in a request.

The weakness was shared 07/26/2012 (Website). The advisory is available at nginx.org. This vulnerability is traded as CVE-2011-4963 since 12/23/2011. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 61394 (nginx on Windows Directory Aliases Access Restriction Bypass), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13268 (Nginx Access Bypass Vulnerability).

Upgrading to version 1.3.0 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12672.

The vulnerability is also documented in the databases at X-Force (77244), Tenable (61394) and Vulnerability Center (SBV-35961†). The entry VDB-5293 is related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Web Server

Name

• nginx

Version

• 1.2.0
• 1.3.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: 61394
Nessus Name: nginx on Windows Directory Aliases Access Restriction Bypass
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: nginx 1.3.0
TippingPoint: 🔍
Fortigate IPS: 🔍

Timelineinfo

12/23/2011 🔍
07/26/2012 +216 days 🔍
07/26/2012 +0 days 🔍
07/26/2012 +0 days 🔍
08/02/2012 +7 days 🔍
08/22/2012 +20 days 🔍
03/23/2015 +943 days 🔍
12/07/2021 +2451 days 🔍

Sourcesinfo

Advisory: nginx.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-4963 (🔍)
GCVE (CVE): GCVE-0-2011-4963
GCVE (VulDB): GCVE-100-61434
X-Force: 77244
SecurityFocus: 55920
Vulnerability Center: 35961 - Igor Sysoev NGINX Remote Security Bypass Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/07/2021 08:10
Changes: 03/23/2015 16:50 (60), 04/16/2017 10:41 (8), 12/07/2021 08:10 (4)
Complete: 🔍
Cache ID: 216:FA5:103

Discussion

Want to know what is going to be exploited?

We predict KEV entries!