| 1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 |
Gentoo Linux Security Advisory GLSA 200907-02 |
| 3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 |
http://security.gentoo.org/ |
| 5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 |
|
| 7 |
Severity: Normal |
| 8 |
Title: ModSecurity: Denial of Service |
| 9 |
Date: July 02, 2009 |
| 10 |
Bugs: #262302 |
| 11 |
ID: 200907-02 |
| 12 |
|
| 13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 |
|
| 15 |
Synopsis |
| 16 |
======== |
| 17 |
|
| 18 |
Two vulnerabilities in ModSecurity might lead to a Denial of Service. |
| 19 |
|
| 20 |
Background |
| 21 |
========== |
| 22 |
|
| 23 |
ModSecurity is a popular web application firewall for the Apache HTTP |
| 24 |
server. |
| 25 |
|
| 26 |
Affected packages |
| 27 |
================= |
| 28 |
|
| 29 |
------------------------------------------------------------------- |
| 30 |
Package / Vulnerable / Unaffected |
| 31 |
------------------------------------------------------------------- |
| 32 |
1 www-apache/mod_security < 2.5.9 >= 2.5.9 |
| 33 |
|
| 34 |
Description |
| 35 |
=========== |
| 36 |
|
| 37 |
Multiple vulnerabilities were discovered in ModSecurity: |
| 38 |
|
| 39 |
* Juan Galiana Lara of ISecAuditors discovered a NULL pointer |
| 40 |
dereference when processing multipart requests without a part header |
| 41 |
name (CVE-2009-1902). |
| 42 |
|
| 43 |
* Steve Grubb of Red Hat reported that the "PDF XSS protection" |
| 44 |
feature does not properly handle HTTP requests to a PDF file that do |
| 45 |
not use the GET method (CVE-2009-1903). |
| 46 |
|
| 47 |
Impact |
| 48 |
====== |
| 49 |
|
| 50 |
A remote attacker might send requests containing specially crafted |
| 51 |
multipart data or send certain requests to access a PDF file, possibly |
| 52 |
resulting in a Denial of Service (crash) of the Apache HTTP daemon. |
| 53 |
NOTE: The PDF XSS protection is not enabled by default. |
| 54 |
|
| 55 |
Workaround |
| 56 |
========== |
| 57 |
|
| 58 |
There is no known workaround at this time. |
| 59 |
|
| 60 |
Resolution |
| 61 |
========== |
| 62 |
|
| 63 |
All ModSecurity users should upgrade to the latest version: |
| 64 |
|
| 65 |
# emerge --sync |
| 66 |
# emerge --ask --oneshot --verbose ">=www-apache/mod_security-2.5.9" |
| 67 |
|
| 68 |
References |
| 69 |
========== |
| 70 |
|
| 71 |
[ 1 ] CVE-2009-1902 |
| 72 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1902 |
| 73 |
[ 2 ] CVE-2009-1903 |
| 74 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1903 |
| 75 |
|
| 76 |
Availability |
| 77 |
============ |
| 78 |
|
| 79 |
This GLSA and any updates to it are available for viewing at |
| 80 |
the Gentoo Security Website: |
| 81 |
|
| 82 |
http://security.gentoo.org/glsa/glsa-200907-02.xml |
| 83 |
|
| 84 |
Concerns? |
| 85 |
========= |
| 86 |
|
| 87 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 88 |
confidentiality and security of our users machines is of utmost |
| 89 |
importance to us. Any security concerns should be addressed to |
| 90 |
security@g.o or alternatively, you may file a bug at |
| 91 |
http://bugs.gentoo.org. |
| 92 |
|
| 93 |
License |
| 94 |
======= |
| 95 |
|
| 96 |
Copyright 2009 Gentoo Foundation, Inc; referenced text |
| 97 |
belongs to its owner(s). |
| 98 |
|
| 99 |
The contents of this document are licensed under the |
| 100 |
Creative Commons - Attribution / Share Alike license. |
| 101 |
|
| 102 |
http://creativecommons.org/licenses/by-sa/2.5 |
Archives