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Apache Modules Multiple Vulnerabilities Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA28046  
Release Date: 2007-12-12
Last Update: 2008-07-10

Critical:
Less critical
Impact: Cross Site Scripting
DoS
Where: From remote
Solution Status: Vendor Patch

Software:Apache 2.2.x

CVE reference:CVE-2007-5000 (Secunia mirror)
CVE-2007-6388 (Secunia mirror)
CVE-2007-6421 (Secunia mirror)
CVE-2007-6422 (Secunia mirror)
CVE-2007-6420 (Secunia mirror)
CVE-2008-0005 (Secunia mirror)
CVE-2008-1678 (Secunia mirror)

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Description:
Some vulnerabilities have been reported in multiple Apache modules, which can be exploited by malicious people to conduct cross-site scripting and cross-site request forgery attacks and by malicious users and malicious people to cause a DoS (Denial of Service).

1) Certain unspecified input passed to "mod_imagemap" is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_imagemap" is enabled and a mapfile is publicly accessible.

2) Input passed via the "refresh" parameter to the "mod_status" module is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_status" is enabled and that the status pages are publicly accessible.

3) Input passed via the worker route and the worker redirect string to the "mod_proxy_balancer" module is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_proxy_balancer" is enabled.

4) An error exists within the balancer manager functionality of the "mod_proxy_balancer" module. This can be exploited by malicious users to cause a DoS via an invalid balancer name.

Successful exploitation results in a crash if a threaded Multi-Processing Module is used on servers where "mod_proxy_balancer" is enabled.

5) The administrative interface of the "mod_proxy_balancer" module allows users to perform certain actions via HTTP requests without performing any validity checks to verify the request. This can be exploited to perform actions with the privileges of a target user, who is tricked into visiting a malicious website.

The vulnerabilities are reported in versions 2.2.6, 2.2.5, 2.2.4, 2.2.3, 2.2.2, and 2.2.0.

NOTE: An error in the "mod_proxy_ftp" module when a forward proxy is configured has also been reported. This can potentially be exploited to conduct cross-site scripting attacks.

6) A memory leak within the "mod_ssl" module can be exploited to cause a DoS by opening a large amount of SSL connections with zlib support.

Successful exploitation of this vulnerability requires that the module is linked against OpenSSL 0.9.8f or later.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.

Solution:
Update to version 2.2.9.
http://httpd.apache.org/download.cgi

Provided and/or discovered by:
1) Reported by the vendor.
2, 3, 4, 5) sp3x, SecurityReason
6) The vendor thanks Joe Orton, Amund Elstad, and Dr Stephen Henson

Changelog:
2008-01-07: Updated advisory to include vulnerabilities #2, #3, and #4.
2008-01-15: Updated credits section and "Original Advisory" section.
2008-01-16: Added link to "Original Advisory" section.
2008-01-21: Updated "Description" and "Solution" sections. Added CVE reference.
2008-01-28: Added CVE reference.
2008-06-16: Added additional details about CVE-2007-6420 through vulnerability #5. Updated "Solution" section.
2008-07-10: Added vulnerability #6. Added CVE reference.

Original Advisory:
http://httpd.apache.org/security/vulnerabilities_22.html
http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?revision=608860

SecurityReason:
http://securityreason.com/securityalert/3541
http://securityreason.com/securityalert/3523
http://securityreason.com/securityalert/3526



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

7 Related Secunia Security Advisories

1. Apache mod_proxy Interim Responses Denial of Service
2. Apache HTTP Method Request Entity Too Large Cross-Site Scripting
3. Apache mod_proxy "date" Denial of Service Vulnerability
4. Apache Denial of Service and Cross-Site Scripting
5. Apache "mod_alias" URL Validation Canonicalization Vulnerability
6. Apache mod_rewrite Off-By-One Buffer Overflow Vulnerability
7. Apache "Expect" Header Cross-Site Scripting Vulnerability


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