nginx up to 1.4 proxy_pass access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability has been found in nginx up to 1.4 (Web Server) and classified as critical. Affected by this vulnerability is an unknown code block of the component proxy_pass. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, and availability. The summary by CVE is:

http/modules/ngx_http_proxy_module.c in nginx 1.1.4 through 1.2.8 and 1.3.0 through 1.4.0, when proxy_pass is used with untrusted HTTP servers, allows remote attackers to cause a denial of service (crash) and obtain sensitive information from worker process memory via a crafted proxy response, a similar vulnerability to CVE-2013-2028.

The issue has been introduced in 09/20/2011. The weakness was released 05/13/2013 by Andrew Alexeev as confirmed mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2013-2070 since 02/19/2013. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 601 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 69748 (Amazon Linux AMI : nginx (ALAS-2013-189)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks.

Upgrading to version 1.5.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at nginx.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13016.

The vulnerability is also documented in the databases at X-Force (84172) and Tenable (69748). Entry connected to this vulnerability is available at 65364.

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: 8.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 8.2
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69748
Nessus Name: Amazon Linux AMI : nginx (ALAS-2013-189)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892721
OpenVAS Name: Debian Security Advisory DSA 2721-1 (nginx - buffer overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: nginx 1.5.0
Patch: nginx.org
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

09/20/2011 🔍
02/19/2013 +518 days 🔍
05/08/2013 +78 days 🔍
05/13/2013 +5 days 🔍
05/13/2013 +0 days 🔍
05/13/2013 +0 days 🔍
05/14/2013 +1 days 🔍
05/20/2013 +6 days 🔍
07/19/2013 +60 days 🔍
09/04/2013 +47 days 🔍
10/07/2013 +33 days 🔍
05/10/2021 +2772 days 🔍

Sourcesinfo

Advisory: seclists.org
Researcher: Andrew Alexeev
Status: Confirmed

CVE: CVE-2013-2070 (🔍)
OVAL: 🔍

X-Force: 84172 - nginx denial of service, Medium Risk
Vulnerability Center: 39664 - Nginx Remote Denial of Service Vulnerability When Using Proxy_pass to Untrusted Upstream HTTP Servers, Medium
SecurityFocus: 59824 - Nginx CVE-2013-2070 Remote Security Vulnerability
Secunia: 55181 - Gentoo update for nginx, Highly Critical
OSVDB: 93282

See also: 🔍

Entryinfo

Created: 05/14/2013 16:44
Updated: 05/10/2021 17:50
Changes: 05/14/2013 16:44 (83), 04/30/2017 10:40 (6), 05/10/2021 17:50 (3)
Complete: 🔍

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