Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Nginx ngx_http_parse_complex_uri() buffer underflow vulnerability
Informations
Name VU#180065 First vendor Publication 2009-09-15
Vendor VU-CERT Last vendor Modification 2009-09-15
Severity (Vendor) N/A Revision M

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:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#180065

Nginx ngx_http_parse_complex_uri() buffer underflow vulnerability

Overview

A vulnerability in the nginx web server may allow remote attackers to execute arbitrary code on an affected system.

I. Description

nginx is an HTTP server and mail proxy server that is available for a number of different platforms. A buffer underflow vulnerability exists in the ngx_http_parse_complex_uri() function when handling specially crafted URIs. Exploitation of this vulnerability would cause the nginx server to write data contained in the URI to heap memory before the allocated buffer.

II. Impact

As with a number of other web servers, nginx is designed to operate with a single privileged master process and multiple unprivileged worker processes handling specific requests. A remote, unauthenticated attacker may be able to execute arbitrary code in the context of the worker process or cause the worker process to crash, resulting in a denial of service.

III. Solution

Upgrade or apply a patch

Updated versions of the nginx package have been released to address this issue. Users should consult the Systems Affected section of this document for information about specific vendors.

Systems Affected

VendorStatusDate NotifiedDate Updated
Apple Inc.Unknown2009-09-052009-09-06
Conectiva Inc.Unknown2009-09-052009-09-06
Cray Inc.Unknown2009-09-052009-09-06
Debian GNU/LinuxVulnerable2009-09-052009-09-14
DragonFly BSD ProjectUnknown2009-09-052009-09-06
EMC CorporationUnknown2009-09-052009-09-06
Engarde Secure LinuxUnknown2009-09-052009-09-06
F5 Networks, Inc.Unknown2009-09-052009-09-06
Fedora ProjectUnknown2009-09-052009-09-06
FreeBSD, Inc.Unknown2009-09-052009-09-06
FujitsuUnknown2009-09-052009-09-06
Gentoo LinuxUnknown2009-09-052009-09-06
Hewlett-Packard CompanyUnknown2009-09-052009-09-06
HitachiUnknown2009-09-052009-09-06
IBM CorporationUnknown2009-09-052009-09-06
IBM eServerUnknown2009-09-052009-09-06
InfobloxUnknown2009-09-052009-09-06
Juniper Networks, Inc.Unknown2009-09-052009-09-06
Mandriva S. A.Unknown2009-09-052009-09-06
MontaVista Software, Inc.Unknown2009-09-052009-09-06
NEC CorporationUnknown2009-09-052009-09-06
NetBSDUnknown2009-09-052009-09-06
nginxVulnerable2009-09-15
NokiaUnknown2009-09-052009-09-06
Novell, Inc.Unknown2009-09-052009-09-06
OpenBSDUnknown2009-09-052009-09-06
Openwall GNU/*/LinuxUnknown2009-09-052009-09-06
QNX Software Systems Inc.Unknown2009-09-052009-09-06
Red Hat, Inc.Unknown2009-09-052009-09-06
SafeNetUnknown2009-09-052009-09-06
Silicon Graphics, Inc.Unknown2009-09-052009-09-06
Slackware Linux Inc.Unknown2009-09-052009-09-06
Sony CorporationUnknown2009-09-052009-09-06
Sun Microsystems, Inc.Not Vulnerable2009-09-052009-09-09
SUSE LinuxNot Vulnerable2009-09-052009-09-08
The SCO GroupNot Vulnerable2009-09-052009-09-08
TurbolinuxUnknown2009-09-052009-09-06
UbuntuUnknown2009-09-052009-09-06
UnisysUnknown2009-09-052009-09-06
Wind River Systems, Inc.Unknown2009-09-052009-09-06

References


Credit

Thanks to Chris Ries of the Carnegie Mellon University Information Security Office for reporting this vulnerability.

This document was written by Chad R Dougherty.

Other Information

Date Public:2009-09-14
Date First Published:2009-09-15
Date Last Updated:2009-09-15
CERT Advisory: 
CVE-ID(s):CVE-2009-2629
NVD-ID(s):CVE-2009-2629
US-CERT Technical Alerts: 
Metric:4.22
Document Revision:8

Original Source

Url : http://www.kb.cert.org/vuls/id/180065

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:13138
 
Oval ID: oval:org.mitre.oval:def:13138
Title: DSA-1884-1 nginx -- buffer underflow
Description: Chris Ries discovered that nginx, a high-performance HTTP server, reverse proxy and IMAP/POP3 proxy server, is vulnerable to a buffer underflow when processing certain HTTP requests. An attacker can use this to execute arbitrary code with the rights of the worker process or possibly perform denial of service attacks by repeatedly crashing worker processes via a specially crafted URL in an HTTP request. For the oldstable distribution, this problem has been fixed in version 0.4.13-2+etch2. For the stable distribution, this problem has been fixed in version 0.6.32-3+lenny2. For the testing distribution, this problem will be fixed soon. For the unstable distribution, this problem has been fixed in version 0.7.61-3. We recommend that you upgrade your nginx packages.
Family: unix Class: patch
Reference(s): DSA-1884-1
CVE-2009-2629
 Version: 5
Platform(s): Debian GNU/Linux 5.0
Debian GNU/Linux 4.0
 Product(s): nginx
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:7674
 
Oval ID: oval:org.mitre.oval:def:7674
Title: DSA-1884 nginx -- buffer underflow
Description: Chris Ries discovered that nginx, a high-performance HTTP server, reverse proxy and IMAP/POP3 proxy server, is vulnerable to a buffer underflow when processing certain HTTP requests. An attacker can use this to execute arbitrary code with the rights of the worker process (www-data on Debian) or possibly perform denial of service attacks by repeatedly crashing worker processes via a specially crafted URL in an HTTP request.
Family: unix Class: patch
Reference(s): DSA-1884
CVE-2009-2629
 Version: 3
Platform(s): Debian GNU/Linux 5.0
Debian GNU/Linux 4.0
 Product(s): nginx
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 297
Os 3
Os 3

OpenVAS Exploits

Date Description
2010-11-18 Name : nginx HTTP Request Remote Buffer Overflow Vulnerability
File : nvt/gb_nginx_http_request_bof_vuln.nasl
2009-12-10 Name : Fedora Core 12 FEDORA-2009-12750 (nginx)
File : nvt/fcore_2009_12750.nasl
2009-12-10 Name : Fedora Core 10 FEDORA-2009-12775 (nginx)
File : nvt/fcore_2009_12775.nasl
2009-12-10 Name : Fedora Core 11 FEDORA-2009-12782 (nginx)
File : nvt/fcore_2009_12782.nasl
2009-10-01 Name : nginx HTTP Request Remote Buffer Overflow Vulnerability
File : nvt/nginx_36384.nasl
2009-09-21 Name : Fedora Core 11 FEDORA-2009-9630 (nginx)
File : nvt/fcore_2009_9630.nasl
2009-09-21 Name : Fedora Core 10 FEDORA-2009-9652 (nginx)
File : nvt/fcore_2009_9652.nasl
2009-09-21 Name : Gentoo Security Advisory GLSA 200909-18 (nginx)
File : nvt/glsa_200909_18.nasl
2009-09-15 Name : Debian Security Advisory DSA 1884-1 (nginx)
File : nvt/deb_1884_1.nasl
2009-09-15 Name : FreeBSD Ports: nginx
File : nvt/freebsd_nginx.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
58128 nginx ngx_http_parse_complex_uri() Function Underflow

The vulnerability is caused due to an error in the processing of URLs within the "ngx_http_parse_complex_uri()" function. This can be exploited to cause a buffer underflow via a specially crafted request and may allow execution of arbitrary code.

Snort® IPS/IDS

Date Description
2014-01-10 nginx URI parsing buffer overflow attempt
RuleID : 17528 - Revision : 10 - Type : SERVER-WEBAPP

Nessus® Vulnerability Scanner

Date Description
2010-02-24 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1884.nasl - Type : ACT_GATHER_INFO
2009-12-08 Name : The remote Fedora host is missing a security update.
File : fedora_2009-12750.nasl - Type : ACT_GATHER_INFO
2009-12-08 Name : The remote Fedora host is missing a security update.
File : fedora_2009-12775.nasl - Type : ACT_GATHER_INFO
2009-12-08 Name : The remote Fedora host is missing a security update.
File : fedora_2009-12782.nasl - Type : ACT_GATHER_INFO
2009-09-24 Name : The web server on the remote host is affected by multiple vulnerabilities.
File : nginx_http_request_buffer_overflow.nasl - Type : ACT_GATHER_INFO
2009-09-21 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200909-18.nasl - Type : ACT_GATHER_INFO
2009-09-16 Name : The remote Fedora host is missing a security update.
File : fedora_2009-9630.nasl - Type : ACT_GATHER_INFO
2009-09-16 Name : The remote Fedora host is missing a security update.
File : fedora_2009-9652.nasl - Type : ACT_GATHER_INFO
2009-09-15 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_152b27f0a15811de990ce5b1d4c882e0.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2014-05-26 13:24:11
  • Multiple Updates
2013-09-09 21:21:59
  • Multiple Updates