Executive Summary

Summary
Title ModSecurity: Denial of Service
Informations
Name GLSA-200907-02 First vendor Publication 2009-07-02
Vendor Gentoo Last vendor Modification 2009-07-02
Severity (Vendor) Normal Revision N/A

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:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

Two vulnerabilities in ModSecurity might lead to a Denial of Service.

Background

ModSecurity is a popular web application firewall for the Apache HTTP server.

Description

Multiple vulnerabilities were discovered in ModSecurity:

* Juan Galiana Lara of ISecAuditors discovered a NULL pointer dereference when processing multipart requests without a part header name (CVE-2009-1902).

* Steve Grubb of Red Hat reported that the "PDF XSS protection"
feature does not properly handle HTTP requests to a PDF file that do not use the GET method (CVE-2009-1903).

Impact

A remote attacker might send requests containing specially crafted multipart data or send certain requests to access a PDF file, possibly resulting in a Denial of Service (crash) of the Apache HTTP daemon.
NOTE: The PDF XSS protection is not enabled by default.

Workaround

There is no known workaround at this time.

Resolution

All ModSecurity users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_security-2.5.9"

References

[ 1 ] CVE-2009-1902 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1902
[ 2 ] CVE-2009-1903 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1903

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200907-02.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200907-02.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 22
Os 2

OpenVAS Exploits

Date Description
2009-08-17 Name : Mandrake Security Advisory MDVSA-2009:183 (apache-mod_security)
File : nvt/mdksa_2009_183.nasl
2009-08-17 Name : Mandrake Security Advisory MDVSA-2009:184 (apache-mod_security)
File : nvt/mdksa_2009_184.nasl
2009-07-06 Name : Gentoo Security Advisory GLSA 200907-02 (mod_security)
File : nvt/glsa_200907_02.nasl
2009-06-16 Name : ModSecurity Multiple Remote Denial of Service Vulnerabilities
File : nvt/gb_modesecurity_remote_dos_vuln.nasl
2009-03-20 Name : Fedora Core 9 FEDORA-2009-2654 (mod_security)
File : nvt/fcore_2009_2654.nasl
2009-03-20 Name : Fedora Core 10 FEDORA-2009-2686 (mod_security)
File : nvt/fcore_2009_2686.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
52553 ModSecurity (mod_security) Multipart Request Header Name Handling DoS
52552 ModSecurity (mod_security) PDF XSS Protection Implementation Crafted HTTP Req...

Nessus® Vulnerability Scanner

Date Description
2013-07-02 Name : The remote web application firewall may be affected by a denial of service vu...
File : modsecurity_2_5_9.nasl - Type : ACT_GATHER_INFO
2009-07-03 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200907-02.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Fedora host is missing a security update.
File : fedora_2009-2686.nasl - Type : ACT_GATHER_INFO
2009-03-16 Name : The remote Fedora host is missing a security update.
File : fedora_2009-2654.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:36:35
  • Multiple Updates